| 1/1 | North American Ice Storm of 19981998年の北米着氷性暴風雨 | Canada | Place: North America | Q2090886 |
| 1/1 | Nagano Winter Olympics '98Japanハイパーオリンピック イン ナガノ | Japan | | Q1523264 |
| 1/1 | January 19981998年1月 | Unknown | | Q3162163 |
| 1/1 | Deaths in January 1998訃報 1998年1月 | Unknown | | Q10844183 |
| 1/1 | 1997–98 Four Hills Tournament | Unknown | | Q829811 |
| 1/1 | Monetary reform in Russia, 1998 | Russia | | Q4157877 |
| 1/1 | Vienna New Year's Concert 1998ウィーンフィル・ニューイヤーコンサート1998 | Unknown | | Q28105656 |
| 1/3 | Brottby Concert | Sweden | Place: Brottby | Q10436163 |
| 1/4 | 1997–98 Lithuanian presidential election1997年リトアニア大統領選挙 | Lithuania | Place: Lithuania | Q1100573 |
| 1/4 | Wilaya of Relizane massacres of 4 January 1998 | Algeria | Place: Ramka | Q3297455 |
| 1/4 | Olympic Airways Flight 417 | United States | | Q3558304 |
| 1/10 | 1998 Słupsk street riots | Poland | Place: Słupsk | Q7667520 |
| 1/10 | 15th AVN Awards | United States | Place: Caesars Palace | Q24807575 |
| 1/11 | Sidi-Hamed massacre | Algeria | | Q7508601 |
| 1/11 | 1998 Cuban parliamentary election | Cuba | | Q2752604 |
| 1/11 | 24th People's Choice Awards | United States | Place: Pasadena Conference Center | Q4632013 |
| 1/12 | murder of Kyle Dinkhellerカイル・ディンケラー殺害事件 | United States | Place: Laurens County | Q16014044 |
| 1/15 | killing of James Ashley | United Kingdom | Place: St Leonards | Q5247454 |
| 1/16 | 1998 Guatemala Student Rapes | Guatemala | Place: Santa Lucía Cotzumalguapa | Q24963808 |
| 1/17 | 4th Screen Awards | India | Place: Andheri Sports Complex | Q108167272 |
| 1/18 | 55th Golden Globe Awards第55回ゴールデングローブ賞 | Unknown | Place: The Beverly Hilton | Q1534980 |
| 1/18 | 1997 Empress's Cup FinalJapan | Japan | Place: Japan National Stadium | Q52496187 |
| 1/20 | 3rd Critics' Choice Awards第3回放送映画批評家協会賞 | United States | Place: Los Angeles | Q2816577 |
| 1/20 | 1998 Czech presidential election1998年チェコ大統領選挙 | Czech Republic | | Q28402099 |
| 1/24 | Souled Out | United States | | Q30597432 |
| 1/24 | 1998 Indy 200 | United States | Place: Walt Disney World Speedway | Q10535329 |
| 1/25 | 1998 Temple of the Tooth attack | Sri Lanka | Place: Kandy | Q4594025 |
| 1/25 | 1998 Wandhama massacre1998年ワンダマ虐殺 | India | | Q4594085 |
| 1/27 | 1998 State of the Union Address | United States | | Q4594001 |
| 1/31 | 12th Goya Awards第12回ゴヤ賞 | Spain | Place: Palacio de Congresos | Q354192 |
| 1/31 | 43rd Filmfare Awards第43回フィルムフェア賞 | India | Place: Mumbai | Q3072094 |
| 1/31 | 1998 24 Hours of Daytona1998年デイトナ24時間レース | United States | Place: Daytona International Speedway | Q104901798 |
| 1/31 | 1998 Heineken Cup Final | France | Place: Stade Chaban-Delmas | Q4593674 |
| 2/1 | Kosovo Warコソボ紛争 | Unknown | Place: Kosovo | Q190029 |
| 2/1 | Norway at the 1998 Winter Olympics1998年長野オリンピックのノルウェー選手団 | Norway | | Q970927 |
| 2/1 | February 19981998年2月 | Unknown | | Q3092776 |
| 2/1 | Deaths in February 1998訃報 1998年2月 | Unknown | | Q10844185 |
| 2/1 | figure skating at the 1998 Winter Olympics – menJapan | Japan | Place: White Ring | Q5347884 |
| 2/1 | figure skating at the 1998 Winter Olympics – pairsJapan | Japan | Place: White Ring | Q5148852 |
| 2/1 | figure skating at the 1998 Winter Olympics – ice danceJapan | Japan | Place: White Ring | Q6344577 |
| 2/1 | 1998 Monegasque general election | Monaco | | Q6898887 |
| 2/1 | 1998 Costa Rican general election | Costa Rica | | Q5174932 |
| 2/1 | 1998 Indian general election in Tamil Nadu | India | | Q6022505 |
| 2/1 | Costa Rican parliamentary election, 1998 | Costa Rica | | Q20014738 |
| 2/1 | 1998 Indian general election in Andhra Pradesh | India | | Q6022306 |
| 2/1 | Tampalakamam massacre | Sri Lanka | | Q7681745 |
| 2/1 | 1998 Norwegian Figure Skating Championships | Norway | Place: Bergenshallen | Q86134825 |
| 2/2 | Cebu Pacific Flight 387セブ・パシフィック航空387便墜落事故 | Philippines | Place: Mount Sumagaya | Q4016236 |
| 2/2 | Executive Order 13072大統領令13072号 | United States | | Q16890004 |
| 2/3 | Cavalese cable car disasterチェルミス・ロープウェイ切断事件 | Italy | Place: Cavalese | Q1865863 |
| 2/3 | 1998 Grand Prix La Marseillaise | France | | Q30346832 |
| 2/4 | February 4, 1998 Afghanistan earthquakeアフガニスタン地震 (1998年2月) | Unknown | | Q5439854 |
| 2/6 | Assassination of Claude Érignac | France | Place: Ajaccio | Q2866966 |
| 2/8 | 1998 Cypriot presidential election | Cyprus | | Q4352220 |
| 2/11 | 16th Fajr International Film Festival | Unknown | Place: Vahdat Hall | Q5869314 |
| 2/12 | 1998 Sudan Air Force crash | Sudan | Place: Nasir | Q16057145 |
| 2/14 | Yaoundé train explosionヤウンデ列車爆発事故 | Cameroon | | Q8049080 |
| 2/15 | Draučiai shooting | Unknown | | Q16209782 |
| 2/16 | China Airlines Flight 676チャイナエアライン676便墜落事故 | Taiwan | Place: Taoyuan | Q709416 |
| 2/16 | 1998 Indian general election1998年インド総選挙 | India | | Q3532246 |
| 2/16 | 1998 Tripura Legislative Assembly election | India | | Q107144834 |
| 2/16 | 1998 Indian general election in Delhi | India | | Q17056091 |
| 2/16 | 1998 Meghalaya Legislative Assembly election | India | | Q96368542 |
| 2/18 | 1998 Indian general election in Maharashtra | India | | Q64362062 |
| 2/19 | Brit Awards 1998 | United Kingdom | Place: London Arena | Q3632232 |
| 2/21 | 1998 Tour du Haut Varツール・デュ・オー・ヴァル1998 | France | | Q347814 |
| 2/21 | 50th Writers Guild of America Awards | United States | | Q8038488 |
| 2/21 | Consistory - 1998 | Vatican City | | Q16160119 |
| 2/22 | SuperBrawl VIII | United States | | Q45345464 |
| 2/23 | 1998 Nagaland Legislative Assembly election | India | | Q108582318 |
| 2/26 | solar eclipse of February 26, 19981998年2月26日の日食 | Unknown | | Q1859295 |
| 2/28 | 23rd César Awards第23回セザール賞 | France | Place: Théâtre des Champs-Élysées | Q225063 |
| 2/28 | Insurgency in Kosovo | Serbia | Place: Kosovo and Metohija | Q18126038 |
| 2/28 | 1998 Omloop Het Volk | Belgium | | Q54430879 |
| 2/28 | Melodi Grand Prix 1998 | Norway | Place: NRK Marienlyst | Q7060930 |
| 3/1 | March 19981998年3月 | Unknown | | Q3294932 |
| 3/1 | Deaths in March 1998訃報 1998年3月 | Unknown | | Q10844186 |
| 3/1 | Likoshane and Qirez massacre | Kosovo | Place: Likoshan | Q3438672 |
| 3/1 | 1998 Lower Saxony state election | Germany | | Q821591 |
| 3/1 | 1998 Men's World Ice Hockey Championships Group C | Hungary | Place: Budapest | Q4150773 |
| 3/1 | Living Dangerously | Unknown | | Q865127 |
| 3/1 | 1998 Indian general election in Kerala | India | | Q104857619 |
| 3/1 | Rey de Reyes | Mexico | | Q16625195 |
| 3/4 | 1998 Israeli presidential election | Israel | | Q2900038 |
| 3/4 | Rui Pedro Teixeira Mendonça | Unknown | | Q20015700 |
| 3/6 | 1998 Vanuatuan general election | Vanuatu | | Q1097256 |
| 3/6 | Jyväskylä rail accident | Finland | Place: Lutakko | Q6319554 |
| 3/7 | Attack on Prekaz | Kosovo | | Q3435524 |
| 3/7 | Festival RTP da Canção 1998 | Portugal | Place: Teatro São Luiz | Q10281933 |
| 3/8 | 4th Screen Actors Guild Awards第4回全米映画俳優組合賞 | United States | Place: Shrine Auditorium and Expo Hall | Q1809363 |
| 3/8 | 1998 Colombian parliamentary election | Colombia | | Q2574773 |
| 3/9 | 1998 Korean Basketball League draft | Unknown | | Q16160573 |
| 3/10 | 4th Annual Blockbuster Entertainment Awards | United States | | Q3641007 |
| 3/11 | 1998 Danish general election | Denmark, Kingdom of Denmark | | Q1966237 |
| 3/13 | March 1998 lunar eclipse1998年3月13日の月食 | Unknown | | Q6756749 |
| 3/14 | Murder of Nadia Roccia | Italy | Place: Castelluccio dei Sauri | Q3705058 |
| 3/14 | 19th Youth in Film Awards | United States | Place: Hollywood | Q4595839 |
| 3/15 | 1998 French regional elections | France | | Q3587405 |
| 3/15 | Pride 2JapanPRIDE.2 | Japan | | Q6147441 |
| 3/15 | 1998 Marlboro Grand Prix of Miami | United States | Place: Homestead-Miami Speedway | Q4593781 |
| 3/15 | 1998 French cantonal elections | France | | Q3586832 |
| 3/15 | 1998 Alsace regional election | France | | Q4735749 |
| 3/15 | Uncensored | United States | | Q48842803 |
| 3/15 | 1998 Brittany regional election | France | | Q4971640 |
| 3/16 | 1998 Armenian presidential election | Armenia | | Q4793289 |
| 3/18 | Formosa Airlines Flight 76231998年国華航空サーブ340墜落事故 | Unknown | | Q89670813 |
| 3/19 | 1998 Ariana Afghan Airlines crash1998年アリアナ・アフガン航空ボーイング727墜落事故 | Afghanistan | Place: Sharki Baratayi Mountain | Q4593350 |
| 3/21 | 13th Independent Spirit Awards第13回インディペンデント・スピリット賞 | United States | Place: Santa Monica | Q1661124 |
| 3/22 | 18th Golden Raspberry Awards第18回ゴールデンラズベリー賞 | United States | Place: Hollywood Roosevelt Hotel | Q1535222 |
| 3/22 | Philippine Airlines Flight 137フィリピン航空137便オーバーラン事故 | Philippines | Place: Bacolod City Domestic Airport | Q4261034 |
| 3/22 | 1998 Moldovan parliamentary election1998年モルドバ議会選挙 | Moldova | | Q2052998 |
| 3/22 | 1998 Dura Lube 200 | United States | Place: Phoenix Raceway | Q10477740 |
| 3/22 | 1998 Lower Austrian state election | Austria | | Q1680662 |
| 3/22 | 1998 Grand Prix de Cholet-Pays de Loire | France | | Q3675365 |
| 3/23 | 70th Academy Awards第70回アカデミー賞 | United States | Place: Shrine Auditorium and Expo Hall | Q536749 |
| 3/24 | Westside Middle School Shootingウェストサイド中学校銃乱射事件 | United States | Place: Westside Middle School | Q123822981 |
| 3/24 | Disappearance of Amy Lynn Bradley | United States | | Q51725648 |
| 3/24 | 1998 Nova Scotia general election | Canada | | Q3586368 |
| 3/25 | 33rd Golden Bell Awards | Taiwan | Place: National Dr. Sun Yat-sen Memorial Hall | Q18118966 |
| 3/25 | 1998 Dwars door Vlaanderen | Belgium | | Q50820516 |
| 3/26 | Murder of Tristan Brübach | Germany | Place: Höchst | Q15727893 |
| 3/26 | Oued Bouaicha massacre | Algeria | Place: Bouira Lahdab | Q7110276 |
| 3/26 | 1998 Tuvaluan general election | Tuvalu | | Q3388215 |
| 3/28 | 1998 E3 Harelbeke | Belgium | | Q29633001 |
| 3/28 | 1998 Budweiser 500kJapan | Japan | Place: Mobility Resort Motegi | Q10437260 |
| 3/29 | 1998 Ukrainian parliamentary election1996年ウクライナ最高議会選挙 | Ukraine | | Q2721129 |
| 3/29 | 1998 Crimean parliamentary election | Russia, Ukraine | | Q12089071 |
| 3/29 | 1998 Brabantse Pijl | Belgium | | Q37577858 |
| 3/29 | 1998 Food City 500 | United States | Place: Bristol Motor Speedway | Q113993739 |
| 4/1 | April 19981998年4月 | Unknown | | Q2874578 |
| 4/1 | Deaths in April 1998訃報 1998年4月 | Unknown | | Q10844187 |
| 4/1 | 1998 Men's World Ice Hockey Championships Group B | Slovenia | Place: Ljubljana | Q10423865 |
| 4/1 | 1998 Sweden Hockey Games | Sweden | | Q10504810 |
| 4/2 | 1998 Hong Kong Election Committee Subsector elections | People's Republic of China | | Q10844221 |
| 4/3 | Spellemannprisen 1997 | Norway | Place: Chateau Neuf | Q12002240 |
| 4/3 | 1998 Route Adélie | France | | Q3941884 |
| 4/3 | 1998 Trofeo Foral de Navarra | Spain | | Q55601557 |
| 4/4 | 1998 Kids' Choice Awards | United States | Place: Pauley Pavilion | Q4593741 |
| 4/4 | WWF Mayhem in Manchester | Unknown | | Q2742400 |
| 4/4 | 第53回ナストロ・ダルジェント賞 | Italy | Place: Cinecittà | Q16581259 |
| 4/5 | 1998 Cúa hostage crisis | Venezuela | Place: Cúa | Q30323811 |
| 4/5 | 1998 Toyota Grand Prix of Long Beach | United States | Place: Long Beach Street Circuit | Q4594044 |
| 4/6 | April 1998 Birmingham tornado | United States | | Q4781900 |
| 4/8 | 1998 Oak Grove–Birmingham tornado | Unknown | | Q135764229 |
| 4/9 | 1998 Hajj stampede | Saudi Arabia | Place: Mecca | Q21028870 |
| 4/10 | Good Friday Agreementベルファスト合意 | United Kingdom | | Q208958 |
| 4/11 | 1998 Grand Prix Pino Cerami | Belgium | | Q59046122 |
| 4/14 | 1998 Paris–Camembert | France | | Q3895897 |
| 4/15 | 1998 La Flèche Wallonneフレッシュ・ワロンヌ1998 | Belgium | | Q1117349 |
| 4/15 | La Flèche Wallonne Femmes 1998 | Belgium | | Q21856730 |
| 4/17 | 1998 Prankote massacre | India | | Q4593914 |
| 4/18 | 51st British Academy Film Awards第51回英国アカデミー賞 | United Kingdom | Place: Grosvenor House Hotel | Q2559694 |
| 4/19 | 1998 Austrian presidential election | Austria | | Q1065093 |
| 4/19 | Spring Stampede | United States | | Q28451243 |
| 4/20 | Air France Flight 422エールフランス422便墜落事故 | Colombia | | Q3083143 |
| 4/20 | Rolex watch murder | Singapore | Place: Marina South | Q108803844 |
| 4/20 | 1998 Boston Marathonボストン・マラソン1998 | United States | Place: Boston | Q2656750 |
| 4/22 | 1998 Scheldeprijs | Belgium | | Q36423591 |
| 4/22 | Côte picarde 1998 | France | | Q63254497 |
| 4/23 | 1998 Grand Prix de Denain | France | | Q3775241 |
| 4/23 | April 23, 1998, Albanian–Yugoslav border ambush | Unknown | Place: Albania-Yugoslavia border | Q21187479 |
| 4/23 | Serbian foreign mediation in Kosovo referendum, 1998 | Yugoslavia | | Q7452911 |
| 4/23 | 29th GMA Dove Awards | United States | Place: Bridgestone Arena | Q4632934 |
| 4/25 | Doñana disasterドニャーナ災害 | Spain | | Q1870498 |
| 4/25 | Disappearance of Rachel Antonio | Australia | Place: Bowen | Q117864983 |
| 4/26 | 17th Hong Kong Film Awards第17回香港電影金像奨 | Hong Kong | Place: Hong Kong Cultural Centre | Q986476 |
| 4/26 | 1998 Saxony-Anhalt state election | Germany | | Q1536940 |
| 4/26 | 1998 London Marathonロンドン・マラソン1998 | United Kingdom | Place: London | Q2521400 |
| 4/26 | 1998 Tour de Vendée | France | | Q3996140 |
| 4/27 | 1998 Bosch Spark Plug Grand Prix | United States | Place: Nazareth Speedway | Q4593403 |
| 4/27 | April 27, 19981998年4月27日 | Unknown | | Q52083684 |
| 4/28 | 1998 WNBA Draft | United States | | Q912269 |
| 4/30 | 1998 Faroese general election | Denmark, Faroe Islands | | Q5202328 |
| 5/1 | Pokhran-IIインドの核実験 | Unknown | | Q3270072 |
| 5/1 | May 19981998年5月 | Unknown | | Q3277988 |
| 5/1 | deaths in May 1998訃報 1998年5月 | Unknown | | Q4475416 |
| 5/1 | 1998 IIHF World Championship1998年アイスホッケー世界選手権 | Switzerland | Place: Zurich | Q17007966 |
| 5/3 | 1998 Spanish motorcycle Grand Prix | Spain | Place: Jerez-Ángel Nieto Circuit | Q3114319 |
| 5/3 | 1998 California 500 | United States | Place: Auto Club Speedway | Q28222627 |
| 5/4 | 1998 Ryukyu Islands earthquakeJapan石垣島南方沖地震 | Japan | | Q4593941 |
| 5/5 | Nouméa Accordヌーメア協定 | France | | Q321912 |
| 5/5 | 1998 Occidental Petroleum Boeing 737 crash1998年オクシデンタル・ペトロリウム ボーイング737墜落事故 | Peru | Place: Andoas District | Q16973631 |
| 5/5 | 1998 Sarno and Quindici landslides | Italy | | Q3612698 |
| 5/6 | 1998 Dutch general election1998年オランダ総選挙 | Netherlands | | Q600588 |
| 5/7 | 1998 Greater London Authority referendumグレーター・ロンドン・オーソリティー設置住民投票 | United Kingdom | Place: Greater London | Q723138 |
| 5/7 | 1998 London local elections | United Kingdom | | Q18160703 |
| 5/10 | 1998 Hungarian parliamentary election | Hungary | | Q2553341 |
| 5/10 | 1998 Rio 400 | Brazil | Place: Autódromo Internacional Nelson Piquet | Q4593932 |
| 5/10 | 1998 Paraguayan general election | Paraguay | | Q7134719 |
| 5/11 | 1998 Philippine presidential election1998年フィリピン大統領選挙 | Philippines | | Q7185382 |
| 5/11 | 1998 Philippine general election | Philippines | | Q1950801 |
| 5/12 | Miss Universe 1998ミス・ユニバース1998 | Unknown | Place: Stan Sheriff Center | Q276808 |
| 5/12 | Trisakti shootings | Indonesia | Place: Trisakti University | Q7843957 |
| 5/14 | It Ain't Seinfeld | United States | | Q19880627 |
| 5/16 | 1998 Belgian Cup Final | Belgium | Place: King Baudouin Stadium | Q28406938 |
| 5/16 | 1998 Scottish Cup Final | United Kingdom | Place: Celtic Park | Q4593953 |
| 5/16 | 1998 Dominican Republic parliamentary election | Dominican Republic | | Q5290804 |
| 5/17 | 1998 Italian motorcycle Grand Prix | Italy | Place: Mugello Circuit | Q3114357 |
| 5/17 | Slamboree | United States | | Q48842794 |
| 5/17 | 1998 Malagasy parliamentary election | Madagascar | | Q6741020 |
| 5/18 | British Academy Television Awards 1998 | United Kingdom | Place: Prince of Wales Theatre | Q4969379 |
| 5/21 | Kip Kinkel | Unknown | | Q1002201 |
| 5/21 | Grand Prix de Wallonie 1998 | Belgium | | Q20731473 |
| 5/22 | Honored Cultural Worker of Azerbaijan | Azerbaijan | | Q25543509 |
| 5/22 | 1998 Aiquile earthquakeアイキレ地震 (1998年) | Bolivia | | Q5943238 |
| 5/22 | Northern Ireland Good Friday Agreement referendum, 1998 | United Kingdom | Place: Northern Ireland | Q7058504 |
| 5/22 | Honored Scientist of Azerbaijan | Azerbaijan | | Q25543507 |
| 5/22 | Honored Art Worker of Azerbaijan | Azerbaijan | | Q5881118 |
| 5/22 | 1998 Indonesian coup d'état attempt | Indonesia | | Q140995147 |
| 5/22 | Eighteenth Amendment of the Constitution of Ireland | Ireland | Place: Ireland | Q3706934 |
| 5/22 | Irish constitutional referendums, 1998 | Ireland | | Q6071433 |
| 5/23 | 1998 Motorola 300 | United States | Place: World Wide Technology Raceway at Gateway | Q4593813 |
| 5/24 | 1998 Senegalese parliamentary election | Senegal | | Q3587249 |
| 5/24 | 1998 Hong Kong legislative election1998年香港立法会選挙 | People's Republic of China | | Q5895324 |
| 5/24 | 1998 Lesotho general election | Lesotho | | Q6531359 |
| 5/25 | Ljubenić massacres | Kosovo | Place: Lubeniqi | Q6645597 |
| 5/25 | Pakistan International Airlines Flight 544パキスタン国際航空544便ハイジャック事件 | Unknown | Place: Gwadar | Q7119308 |
| 5/25 | May 25, 19981998年5月25日 | Unknown | | Q30059526 |
| 5/26 | 1998 MIAT Mongolian Airlines crash | Mongolia | | Q4593767 |
| 5/27 | 1998 Multishow Brazilian Music Awards | Brazil | Place: Canecão | Q30932327 |
| 5/27 | Sudanese constitutional referendum, 1998 | Sudan | | Q7633379 |
| 5/28 | Chagai-Iパキスタンの核実験 | Pakistan | | Q2658429 |
| 5/28 | Danish Amsterdam Treaty referendum | Denmark | | Q4994021 |
| 5/29 | 9th Golden Melody Awards第9回金曲奨 | Taiwan | Place: National Dr. Sun Yat-sen Memorial Hall | Q15900011 |
| 5/30 | 1998 MTV Movie AwardsMTVムービー・アワード1998 | United States | Place: Santa Monica Airport | Q133603 |
| 5/30 | Acerinox accidentアセリノックス事故 | Spain | Place: Cádiz Province | Q4673208 |
| 5/30 | May 30, 1998 Afghanistan earthquakeマグニチュード6.6 | Unknown | | Q6796396 |
| 5/30 | Chagai-IIチャガイⅡ | Pakistan | Place: Balochistan | Q5066829 |
| 5/31 | 1998 San Marino general election | San Marino | | Q3722524 |
| 5/31 | 1998 Colombian presidential election | Colombia | | Q2046123 |
| 5/31 | 1998 Valdostan regional election | Italy | | Q3722684 |
| 5/31 | 1998 Ukrainian Cup Final | Ukraine | Place: Olimpiyskiy National Sports Complex | Q4594071 |
| 5/31 | 1998 Ecuadorian general election | Ecuador | | Q5334403 |
| 5/31 | 1998 Montenegrin parliamentary election | Montenegro | | Q3722376 |
| 5/31 | 1998 Miller 200 | United States | Place: Milwaukee Mile | Q4593796 |
| 5/31 | May 31, 19981998年5月31日 | Unknown | | Q69302206 |
| 6/1 | June 19981998年6月 | Unknown | | Q3188271 |
| 6/1 | Deaths in June 1998訃報 1998年6月 | Unknown | | Q10844189 |
| 6/1 | 1998 Champions Super League | People's Republic of China | Place: Guangzhou | Q4048102 |
| 6/2 | 1998 Oakland mayoral election | United States | | Q77523227 |
| 6/3 | Eschede derailmentエシェデ鉄道事故 | Germany | Place: Eschede | Q313404 |
| 6/3 | 1997-98 Estonian Supercup | Estonia | | Q116790575 |
| 6/4 | 1998 South Korean local elections第2回全国同時地方選挙 | South Korea | | Q5518762 |
| 6/6 | 1998 True Value 500 | United States | Place: Texas Motor Speedway | Q10705254 |
| 6/7 | murder of James Byrd Jr.ジェームズ・バード・ジュニア殺人事件 | United States | Place: Jasper | Q107278283 |
| 6/7 | 1998 Guinea-Bissau coup attempt | Guinea-Bissau | | Q126123404 |
| 6/7 | 1998 ITT Automotive Detroit Grand Prix | United States | Place: Belle Isle circuit | Q4593694 |
| 6/7 | 65th Tokyo YūshunJapan第65回東京優駿 | Japan | Place: Tokyo Racecourse | Q138744549 |
| 6/7 | Triplemanía VI | Mexico | Place: Chihuahua City | Q15733146 |
| 6/8 | 51st FIFA Congress | France | | Q20313002 |
| 6/8 | 1998 Portuguese abortion referendum | Portugal | | Q2105455 |
| 6/8 | Kichwamba massacre | Uganda | | Q109536816 |
| 6/10 | 24th Saturn Awards第24回サターン賞 | United States | Place: California | Q2226438 |
| 6/10 | 1997–98 Kazakhstan Cup Final | Kazakhstan | Place: Almaty Central Stadium | Q25058349 |
| 6/13 | 45th Filmfare Awards South第45回フィルムフェア賞 南インド映画部門 | India | | Q24905003 |
| 6/14 | 1998 Friuli-Venezia Giulia regional election | Italy | | Q3722618 |
| 6/14 | Game 6 of the 1998 NBA Finals | United States | Place: Delta Center | Q9087111 |
| 6/14 | 1998 Taça de Portugal Final | Portugal | Place: Estádio Nacional | Q16851727 |
| 6/14 | The Great American Bash | United States | | Q48344113 |
| 6/15 | 1998 Vincentian general election | Saint Vincent and the Grenadines | | Q7932168 |
| 6/15 | 1998 World Cup terror plot | France | Place: Stade Vélodrome | Q26884643 |
| 6/18 | Propair Flight 420プロップエア420便墜落事故 | Canada | | Q39058384 |
| 6/19 | 1998 Czech legislative election1998年チェコ議会下院選挙 | Czech Republic | | Q24169 |
| 6/19 | 1998 Chapnari massacre | India | | Q4593445 |
| 6/20 | 1998 Grand Prix de Plumelec-Morbihan | France | | Q4025135 |
| 6/21 | 1998 Togolese presidential election | Togo | | Q1748285 |
| 6/21 | United States v Iran (1998 FIFA World Cup) | France | Place: Stade de Gerland | Q18470268 |
| 6/21 | 1998 Budweiser/G.I. Joe's 200 | United States | Place: Portland International Raceway | Q4593410 |
| 6/22 | 1998 Sokcho submarine incident | South Korea | | Q16000825 |
| 6/23 | Chenggu axe massacre | People's Republic of China | Place: Chenggu County | Q16961306 |
| 6/24 | 1998 NBA Draft1998年のNBAドラフト | Canada | Place: Rogers Arena | Q371335 |
| 6/24 | Protocol on Heavy Metals | Unknown | | Q17514864 |
| 6/24 | Pride 3JapanPRIDE.3 | Japan | Place: Nippon Budōkan | Q6147763 |
| 6/25 | Aarhus Conventionオーフス条約 | Unknown | | Q301336 |
| 6/25 | 1998 Northern Ireland Assembly election | United Kingdom | | Q2076208 |
| 6/26 | 1988 Malian parliamentary election1988年マリ国民議会選挙 | Mali | | Q3587204 |
| 6/27 | 1998 Dutch TT1998年のオランダグランプリ | Netherlands | Place: TT Circuit Assen | Q195127 |
| 6/27 | Adana–Ceyhan earthquake of 1998アダナ-ジェイハン地震 | Turkey | | Q3496756 |
| 6/27 | The Undertaker vs. Mankind | United States | Place: Civic Arena | Q3129814 |
| 6/28 | 1998 New England 200 | United States | Place: New Hampshire Motor Speedway | Q10600247 |
| 6/28 | 1998 Save Mart/Kragen 350 | United States | Place: Sonoma Raceway | Q114153098 |
| 6/28 | United Airlines Flight 863 | Unknown | | Q28450484 |
| 6/29 | 1998 Championnat National 1 Final | Algeria | Place: Stade 5 Juillet 1962 | Q28404904 |
| 7/1 | July 19981998年7月 | Unknown | | Q3188205 |
| 7/1 | Klečka killings | Kosovo | Place: Kleçka | Q10546229 |
| 7/1 | Deaths in July 1998訃報 1998年7月 | Unknown | | Q10844190 |
| 7/1 | 1998 Swedish Open | Sweden | Place: Båstad Tennis Stadium | Q3978713 |
| 7/2 | Biak massacre | Indonesia | Place: Biak Island | Q116265507 |
| 7/2 | 1998 President of the Hong Kong Legislative Council election | People's Republic of China | | Q116798282 |
| 7/3 | murder of Lev Rokhlin | Unknown | Place: Klokovo | Q28667033 |
| 7/5 | 1998 British motorcycle Grand Prix | United Kingdom | Place: ドニントン・パーク | Q3114454 |
| 7/5 | 43rd David di Donatello Awards第43回ダヴィッド・ディ・ドナテッロ賞 | Italy | Place: Rome | Q3703431 |
| 7/7 | July 7, 19981998年7月7日 | Unknown | | Q61762211 |
| 7/10 | kidnapping of Kamiyah Mobley | United States | Place: ジャクソンヴィル | Q130212715 |
| 7/11 | 1998 Tour de France, prologueツール・ド・フランス1998 プロローグ | Ireland | | Q2397721 |
| 7/12 | 1998 Japanese House of Councillors electionJapan第18回参議院議員通常選挙 | Japan | | Q834174 |
| 7/12 | 1998 Jiffy Lube 300 | United States | Place: New Hampshire Motor Speedway | Q114197939 |
| 7/12 | 1998 Medic Drug Grand Prix of Cleveland | United States | Place: Cleveland circuit | Q4593782 |
| 7/12 | Bash at the Beach | United States | | Q48842741 |
| 7/15 | 1998 Tour de France, stage 4ツール・ド・フランス1998 第4ステージ | France | | Q2817078 |
| 7/17 | Rome Statute of the International Criminal Court国際刑事裁判所ローマ規程 | Italy | Place: Rome | Q838958 |
| 7/17 | 1998 Papua New Guinea earthquake1998パプアニューギニア地震 | Papua New Guinea | Place: Papua New Guinea | Q3133143 |
| 7/18 | July 18, 1998 Albanian–Yugoslav border clashes | Unknown | Place: Albania-Yugoslavia border | Q22695826 |
| 7/19 | 1998 German motorcycle Grand Prix | Germany | Place: Sachsenring | Q3114283 |
| 7/19 | 1998 Pep Boys 400K | United States | Place: Dover Motor Speedway | Q10623527 |
| 7/19 | 1998 Molson Indy Toronto | Canada | Place: Toronto Street Circuit | Q4593804 |
| 7/20 | Attack on Orahovac | Kosovo | Place: Rahovec | Q12755974 |
| 7/20 | 1998 Tour de France, stage 9ツール・ド・フランス1998 第9ステージ | France | | Q2818836 |
| 7/24 | Ushuaia Protocol | Argentina | Place: Ushuaia | Q10354676 |
| 7/24 | 1998 United States Capitol shooting1998年アメリカ合衆国議会議事堂銃撃事件 | United States | Place: Washington, D.C. | Q7889599 |
| 7/25 | Wakayama curry-poisoning incidentJapan和歌山毒物カレー事件 | Japan | | Q105086050 |
| 7/25 | 1998 VisionAire 500K | United States | Place: Charlotte Motor Speedway | Q10716108 |
| 7/26 | 1998 North Korean parliamentary election第十期最高人民会議代議員選挙 | North Korea | | Q3587220 |
| 7/26 | 1998 Cambodian general election1998年カンボジア国民議会選挙 | Cambodia | | Q5025194 |
| 7/26 | 1998 U.S. 500 Presented by Toyota | United States | Place: Michigan International Speedway | Q4594046 |
| 7/30 | Proteus Airlines Flight 706プロテウス航空706便空中衝突事故 | France | Place: Quiberon Bay | Q3002158 |
| 8/1 | August 19981998年8月 | Unknown | | Q2858059 |
| 8/1 | Deaths in August 1998訃報 1998年8月 | Unknown | | Q10844191 |
| 8/1 | 1998 Brickyard 400 | United States | Place: Indianapolis Motor Speedway | Q23016875 |
| 8/3 | 1998 Chamba massacre | India | | Q4593444 |
| 8/4 | 1998 Bahía de Caráquez earthquake | Ecuador | | Q4593384 |
| 8/5 | Korean Air Flight 8702 | South Korea | Place: Incheon International Airport | Q6830431 |
| 8/7 | 1998 United States embassy bombingsアメリカ大使館爆破事件 | Kenya, Tanzania | Place: Kenya | Q876206 |
| 8/7 | Inauguration of Andrés Pastrana | Colombia | Place: National Capitol | Q126052794 |
| 8/8 | 1998 Iranian diplomats murder in Afghanistanアフガニスタン国内のイラン外交官殺害事件 | Afghanistan | Place: Mazar-i-Sharif | Q4593711 |
| 8/8 | Jaghalkani-i-Takhta Pul massacres1998年マザーリシャリーフ虐殺 | Afghanistan | | Q6122576 |
| 8/8 | August 1998 lunar eclipse1998年8月8日の月食 | Unknown | | Q4820544 |
| 8/8 | Road Wild | United States | | Q48842750 |
| 8/9 | 1998 Miller Lite 200 | United States | Place: Mid-Ohio Sports Car Course | Q4593795 |
| 8/10 | Nevis independence referendum1998年ネイビス島独立住民投票 | Saint Kitts and Nevis | | Q16999238 |
| 8/10 | death of Nicky Verstappen | Netherlands | Place: Brunssummerheide | Q2401554 |
| 8/11 | 1998 Bukit Merah stabbing | Unknown | Place: Bukit Merah | Q123470112 |
| 8/12 | Suonenjoki rail collision | Finland | Place: Suonenjoki railway station | Q5369678 |
| 8/12 | 1998 Shenyang trolleybus electrocution accident | People's Republic of China | Place: Shenyang | Q15934748 |
| 8/15 | Omagh bombingオマー爆弾テロ事件 | United Kingdom | Place: Omagh | Q2358366 |
| 8/15 | 1998 HEW CyclassicsHEWサイクラシックス1998 | Germany | | Q3124834 |
| 8/15 | Operation Eagle (Kosovo War) | Unknown | | Q123612082 |
| 8/16 | Battle of Junik | Unknown | Place: Junik | Q4871353 |
| 8/16 | Silk–Miller police murders | Australia | Place: Moorabbin | Q12504379 |
| 8/16 | Kevin case | Sweden | | Q10545204 |
| 8/16 | 1998 Radisson 200 | United States | Place: Pikes Peak International Raceway | Q10648468 |
| 8/16 | 1998 Texaco/Havoline 200 | United States | Place: Road America | Q4594031 |
| 8/18 | Malpa landslide | India | | Q6744569 |
| 8/20 | al-Shifa pharmaceutical factory | Sudan | Place: Khartoum North | Q475353 |
| 8/20 | cruise missile strikes on Afghanistan and Sudanインフィニット・リーチ作戦 | Unknown | | Q837887 |
| 8/21 | transit of Venus from Mars金星の日面通過 | Unknown | | Q1149317 |
| 8/22 | solar eclipse of August 22, 19981998年8月22日の日食 | Unknown | | Q1472163 |
| 8/23 | 1998 Czech Republic motorcycle Grand Prix1998年のチェコグランプリ | Czech Republic | Place: Masaryk Circuit | Q3114479 |
| 8/23 | 1998 Züri-Metzgete | Switzerland | | Q2499200 |
| 8/24 | Myanma Airways Flight 635 | Myanmar | | Q6946731 |
| 8/24 | Kasika massacre | Democratic Republic of the Congo | | Q120291731 |
| 8/27 | 1998 Belizean general election | Belize | | Q3722293 |
| 8/29 | Cubana de Aviación Flight 389クバーナ航空389便オーバーラン事故 | Ecuador | Place: Quito | Q6164961 |
| 8/29 | 1998 Atlanta 500 Classic | United States | Place: Atlanta Motor Speedway | Q10421620 |
| 8/29 | Amanda Award 1998 | Norway | Place: Haugesund Municipality | Q3910420 |
| 8/30 | 1998 GP Ouest-FranceGP西フランス・プルエー1998 | France | | Q2182015 |
| 8/30 | 1998 Farm Aid on CMT 300 | United States | Place: New Hampshire Motor Speedway | Q114289582 |
| 9/1 | Category:September 1998Category:1998年9月 | Unknown | | Q9412416 |
| 9/1 | September 19981998年9月 | Unknown | | Q3478987 |
| 9/1 | Deaths in September 1998訃報 1998年9月 | Unknown | | Q10844192 |
| 9/1 | Category:September 1998 by country | Unknown | | Q79329302 |
| 9/1 | Category:September 1998 in Russia | Unknown | | Q106873259 |
| 9/1 | 1998 Česká pojišťovna Cup | Czech Republic | | Q11283148 |
| 9/1 | Lake Radonjić massacre | Kosovo | Place: Radoniq Lake | Q1282530 |
| 9/1 | Category:September 1998 in Europe | Unknown | | Q30617395 |
| 9/1 | Category:September 1998 by continent | Unknown | | Q30617398 |
| 9/1 | Category:September 1998 in North America | Unknown | | Q56488866 |
| 9/1 | Category:September 1998 in Asia | Unknown | | Q79292828 |
| 9/1 | Category:September 1998 in the United States | Unknown | | Q79329298 |
| 9/1 | Category:September 1998 in Australia | Unknown | | Q106084739 |
| 9/1 | Category:September 1998 in Germany | Unknown | | Q120785160 |
| 9/1 | Category:September 1998 in sports | Unknown | | Q13348199 |
| 9/1 | 1998 Monrovia clashes | Liberia | Place: Monrovia | Q39087721 |
| 9/1 | Category:September 1998 in Oceania | Unknown | | Q79292743 |
| 9/1 | Category:September 1998 in Canada | Unknown | | Q86803203 |
| 9/1 | Category:September 1998 in Africa | Unknown | | Q105291975 |
| 9/1 | Category:September 1998 sports events in Australia | Unknown | | Q106084738 |
| 9/1 | Category:September 1998 in France | Unknown | | Q126449601 |
| 9/1 | Category:September 1998 in Italy | Unknown | | Q127427348 |
| 9/1 | Category:September 1998 in China | Unknown | | Q131511568 |
| 9/1 | Category:September 1998 sports events in Italy | Unknown | | Q134568900 |
| 9/1 | Category:September 1998 in Sweden | Unknown | | Q135469630 |
| 9/1 | Category:September 1998 in Qatar | Unknown | | Q135775349 |
| 9/1 | 1998 Battle of Kilinochchi | Sri Lanka | Place: Kilinochchi | Q4593391 |
| 9/1 | Category:September 1998 sports events in Europe | Unknown | | Q61874937 |
| 9/1 | Category:September 1998 sports events in Oceania | Unknown | | Q79292736 |
| 9/1 | Category:September 1998 sports events in Asia | Unknown | | Q79292821 |
| 9/1 | Category:September 1998 sports events in the United States | Unknown | | Q79329281 |
| 9/1 | Category:September 1998 sports events in North America | Unknown | | Q79329294 |
| 9/1 | Category:September 1998 in Mexico | Unknown | | Q86803206 |
| 9/1 | Category:September 1998 in the United Kingdom | Unknown | | Q86803209 |
| 9/2 | Swissair Flight 111スイス航空111便墜落事故 | Canada | Place: Atlantic Ocean | Q461911 |
| 9/5 | 1998 Maltese general election | Malta | | Q2069102 |
| 9/6 | 1998 Grote Prijs Jef Scherens | Belgium | | Q21093808 |
| 9/6 | September 1998 lunar eclipse1998年9月6日の月食 | Unknown | | Q7452130 |
| 9/6 | 1998 Molson Indy Vancouver | Canada | Place: Streets of Vancouver | Q4593806 |
| 9/6 | Category:September 6, 1998 | Unknown | | Q88751376 |
| 9/10 | Rotterdam Conventionロッテルダム条約 | Netherlands | Place: Rotterdam | Q94947 |
| 9/10 | China Eastern Airlines Flight 586 | People's Republic of China | | Q10874618 |
| 9/12 | 1998 Bosnian general election | Bosnia and Herzegovina | | Q3722277 |
| 9/12 | Treaty of Estella | Spain | Place: Estella-Lizarra | Q3326991 |
| 9/12 | 1998 Paris–Brussels | France, Belgium | | Q57778523 |
| 9/13 | 1998 Bavarian state election | Germany | | Q1804071 |
| 9/13 | 1998 Republika Srpska general election | Republika Srpska | | Q20435656 |
| 9/13 | 1998 Grand Prix de Fourmies | France | | Q3775262 |
| 9/13 | 1998 Honda Grand Prix of Monterey | United States | Place: WeatherTech Raceway Laguna Seca | Q4593679 |
| 9/13 | Fall Brawl | United States | | Q48842767 |
| 9/19 | 1998 Welsh Labour Party leadership election | United Kingdom | Place: Newport | Q101437304 |
| 9/19 | Miss America 1999ミス・アメリカ1999 | United States | Place: Boardwalk Hall | Q6876123 |
| 9/20 | 1998 Swedish general election1998年スウェーデン総選挙 | Sweden | | Q1813189 |
| 9/20 | 1998 Berlin Marathonベルリン・マラソン1998 | Germany | Place: Berlin | Q2266704 |
| 9/20 | 1998 Lone Star 500 | United States | Place: Texas Motor Speedway | Q10569137 |
| 9/20 | 1998 Grand Prix d'Isbergues | France | | Q3775214 |
| 9/22 | Southern African Development Community intervention in Lesotho | Lesotho | Place: Lesotho | Q4335258 |
| 9/25 | 1998 Slovak parliamentary election1998年スロバキア国民議会選挙 | Slovakia | | Q1634782 |
| 9/25 | PauknAir Flight 4101PauknAir4101便墜落事故 | Spain | | Q7148890 |
| 9/25 | 1998 Pymatuning earthquakeアメリカ合衆国ペンシルベイニア州での5.2 Mwの地震 | United States | | Q4593925 |
| 9/26 | Gornje Obrinje massacreゴルニェ・オブリニェの虐殺 | Federal Republic of Yugoslavia | | Q3438639 |
| 9/26 | Slovak privatisation referendum | Slovakia | | Q4181425 |
| 9/27 | 1998 German federal electionドイツ連邦議会1998年選挙 | Germany | | Q704641 |
| 9/27 | 1998 Mecklenburg-Vorpommern state election | Germany | | Q1711684 |
| 9/27 | 1998 French Senate election | France | | Q3587554 |
| 9/28 | 1998 National League Wild Card tie-breaker game | United States | Place: Wrigley Field | Q4593842 |
| 9/29 | Lionair Flight 602ライオン航空602便 | Sri Lanka | | Q6555483 |
| 9/29 | 1998 Mionica earthquake | Unknown | | Q4593805 |
| 9/30 | Operation Fenix | Unknown | Place: Albania-Yugoslavia border | Q104845387 |
| 10/1 | October 19981998年10月 | Unknown | | Q3348948 |
| 10/1 | Deaths in October 1998訃報 1998年10月 | Unknown | | Q10844180 |
| 10/1 | 1998 Arab Nations Cup Final | Unknown | Place: Doha | Q104881750 |
| 10/1 | 1998 Paris–Bourges | France | | Q3895870 |
| 10/3 | 1998 Latvian parliamentary election | Latvia | | Q93981 |
| 10/3 | 1998 Australian federal election | Australia | | Q1357740 |
| 10/3 | Latvian citizenship referendum, 1998 | Latvia | | Q4393786 |
| 10/3 | Northern Territory referendum, 1998 | Australia | Place: Northern Territory | Q7059067 |
| 10/4 | 1998 Brazilian general election1998年ブラジル総選挙 | Brazil | | Q2346732 |
| 10/4 | 1998 Texaco Grand Prix of Houston | United States | Place: Houston Street Circuit | Q4594032 |
| 10/4 | 1998 Brazilian presidential election | Brazil | | Q18471338 |
| 10/4 | 1998 Maranhão gubernatorial election | Brazil | | Q18472294 |
| 10/7 | 1998 UCI Road World Championships – Women's time trial | Netherlands | Place: Limburg | Q2995901 |
| 10/8 | Japan–South Korea Joint Declaration of 1998Japan日韓共同宣言 | Japan, South Korea | | Q2858194 |
| 10/8 | United Nations Security Council election, 19981998年国連安保理 非常任理事国選挙 | Unknown | | Q4128637 |
| 10/10 | Indictment and arrest of Augusto Pinochet | United Kingdom, Argentina | Place: London | Q11679964 |
| 10/10 | 1998 Lignes Aériennes Congolaises crash1998年コンゴ航空ボーイング727撃墜事件 | Democratic Republic of the Congo | | Q4593756 |
| 10/10 | 1998 UCI Road World Championships – Women's road race | Unknown | Place: Valkenburg aan de Geul | Q4594057 |
| 10/11 | 1998 Azerbaijani presidential election | Azerbaijan | | Q4832442 |
| 10/11 | 1998 Chicago Marathonシカゴ・マラソン1998 | United States | Place: Chicago | Q2247597 |
| 10/11 | Pride 4JapanPRIDE.4 | Japan | Place: Tokyo Dome | Q6147747 |
| 10/11 | 1998 Las Vegas 500K | United States | Place: Las Vegas Motor Speedway | Q10554530 |
| 10/11 | 1998 Polish local elections | Poland | | Q9379029 |
| 10/16 | UFC Brazil | United States | Place: Brazil | Q375075 |
| 10/16 | 1998 Maldivian presidential election | Maldives | | Q6742862 |
| 10/17 | Kyrgyzstani constitutional referendum, 1998 | Kyrgyzstan | | Q2515518 |
| 10/18 | 1998 Macedonian parliamentary election | North Macedonia | | Q3408804 |
| 10/18 | 1998 Honda Indy 300 | Australia | Place: Surfers Paradise Street Circuit | Q4593683 |
| 10/18 | Machuca massacre | Colombia | Place: Antioquia | Q5786070 |
| 10/20 | Adana Agreement | Unknown | Place: Adana | Q61077787 |
| 10/20 | Murder of Lyn Bryant | United Kingdom | Place: コーンウォール | Q135338893 |
| 10/23 | Wye River Memorandumワイ・リバー合意 | Unknown | | Q1568374 |
| 10/23 | 1998 Iranian Assembly of Experts election | Iran | | Q15853370 |
| 10/25 | 1998 Basque regional election1998年バスク自治州議会選挙 | Spain | | Q5669472 |
| 10/25 | MLS Cup 1998MLSカップ 1998 | United States | Place: Rose Bowl | Q2487787 |
| 10/25 | 1998 Argentine motorcycle Grand Prix | Argentina | Place: Oscar and Juan Gálvez Race Track | Q3114292 |
| 10/25 | 1998 Dura Lube/Kmart 500 | United States | Place: Phoenix Raceway | Q114397655 |
| 10/25 | 1998 Japan CupJapanジャパンカップサイクルロードレース1998 | Japan | | Q3807089 |
| 10/25 | Halloween Havoc | United States | | Q48842777 |
| 10/26 | Brasilia Presidential Actブラジリア大統領法協定 | Peru, Ecuador | Place: Brasília | Q15991253 |
| 10/27 | 4th National Television Awards | United Kingdom | Place: Royal Albert Hall | Q4639372 |
| 10/29 | Gothenburg discothèque fire | Sweden | Place: Gothenburg | Q5587844 |
| 10/29 | British Independent Film Awards 1998第1回英国インディペンデント映画賞 | United Kingdom | Place: Hotel Café Royal | Q919496 |
| 11/1 | November 19981998年11月 | Unknown | | Q7064685 |
| 11/1 | Deaths in November 1998訃報 1998年11月 | Unknown | | Q10844181 |
| 11/1 | 1998 Stockholm Open | Sweden | Place: Royal Tennis Hall | Q3973736 |
| 11/1 | 1999 World Junior Figure Skating Championships1999年世界ジュニアフィギュアスケート選手権 | Croatia | Place: Zagreb | Q4595297 |
| 11/1 | 1998 Karjala Tournament | Finland | | Q1729644 |
| 11/1 | 1998 Trophée Lalique | France | Place: Accor Arena | Q128565 |
| 11/1 | 1998 New York City Marathonアメリカ合衆国、ニューヨークで開催したマラソン大会 | United States | Place: New York City | Q13895444 |
| 11/1 | Siege of Mitú | Colombia | Place: Mitú | Q3403831 |
| 11/1 | 1998 Cup of Russia | Russia | Place: Moscow | Q4593478 |
| 11/1 | 1998 Marlboro 500 Presented by Toyota | United States | Place: Auto Club Speedway | Q4593780 |
| 11/1 | 1998 Skate Canada International1998年スケートカナダ | Canada | Place: Kamloops | Q4593964 |
| 11/1 | 1998 Sparkassen Cup on Ice | Germany | Place: Emscher-Lippe-Halle | Q4593976 |
| 11/1 | 118th Tenno ShoJapan第118回天皇賞 | Japan | Place: Tokyo Racecourse | Q11600085 |
| 11/1 | 1998 Estonian Supercup | Estonia | | Q116790574 |
| 11/1 | Повінь на Закарпатті 1998 року | Ukraine | Place: Lviv Oblast | Q12141276 |
| 11/1 | 1998 Norwegian Football Cup Final | Norway | Place: Ullevaal Stadion | Q23042267 |
| 11/1 | 1998 State Visit by Jiang Zemin to Japan1998年江沢民の日本訪問 | Unknown | | Q48815519 |
| 11/1 | November to Remember (1998) | United States | | Q55625551 |
| 11/1 | 1998 Montreal municipal election | Canada | | Q6906375 |
| 11/1 | 1998 Quebec municipal elections | Canada | | Q7269836 |
| 11/1 | Murder of Gabriel Kisch | Sweden | | Q78972922 |
| 11/2 | 1998 United Nations Climate Change Conference第4回気候変動枠組条約締約国会議 | Argentina | Place: Centro de Exposiciones de Buenos Aires | Q4594068 |
| 11/2 | 1998 Massachusetts gubernatorial election1998年マサチューセッツ州知事選挙 | United States | | Q6784436 |
| 11/3 | 1998 Texas gubernatorial election1998年テキサス州知事選挙 | United States | | Q3586276 |
| 11/3 | 1998 United States Senate elections1998年アメリカ合衆国上院議員選挙 | United States | | Q4347740 |
| 11/3 | 1998 United States House of Representatives elections1998年アメリカ合衆国下院議員選挙 | United States | | Q923029 |
| 11/3 | 1998 New Mexico gubernatorial election1998年ニューメキシコ州知事選挙 | United States | | Q10271395 |
| 11/3 | 1998 Minnesota gubernatorial election1998年ミネソタ州知事選挙 | United States | | Q16152636 |
| 11/3 | 1998 Illinois gubernatorial election1998年イリノイ州知事選挙 | United States | | Q3586270 |
| 11/3 | 1998 United States Senate election in Illinoisイリノイ州の1998年アメリカ合衆国上院議員選挙 | United States | | Q7891525 |
| 11/3 | 1998 United States elections | United States | | Q7892456 |
| 11/3 | 1998 Pennsylvania lieutenant gubernatorial election1998年ペンシルベニア州副知事選挙 | United States | | Q16202518 |
| 11/3 | 1998 United States House of Representatives elections in Indiana | United States | | Q16848245 |
| 11/3 | 1998 Washington, D.C. mayoral election | United States | | Q23132649 |
| 11/3 | 1998 Alabama gubernatorial election1998年アラバマ州知事選挙 | United States | | Q4705375 |
| 11/3 | 1998 Alaska gubernatorial election1998年アラスカ州知事選挙 | United States | | Q4708641 |
| 11/3 | 1998 Florida gubernatorial election1998年フロリダ州知事選挙 | United States | | Q5461733 |
| 11/3 | 1998 Hawaii gubernatorial election1998年ハワイ州知事選挙 | United States | | Q5684467 |
| 11/3 | 1998 United States Senate election in Arizonaアリゾナ州の1998年アメリカ合衆国上院議員選挙 | United States | | Q7891390 |
| 11/3 | 1998 United States Senate election in Indianaインディアナ州の1998年アメリカ合衆国上院議員選挙 | United States | | Q7891536 |
| 11/3 | 1998 United States Senate election in Nevadaネバダ州の1998年アメリカ合衆国上院議員選挙 | United States | | Q7891729 |
| 11/3 | 1998 United States Senate election in New Yorkニューヨーク州の1998年アメリカ合衆国上院議員選挙 | United States | | Q7891828 |
| 11/5 | 1998 Financial Services by-election | People's Republic of China | | Q28415692 |
| 11/5 | 5 November 1989 Lebanese presidential election | Lebanon | | Q55616701 |
| 11/8 | 1998 São Toméan legislative election | São Tomé and Príncipe | | Q7665735 |
| 11/8 | New Caledonian Nouméa Accord referendum, 1998 | France | | Q16932884 |
| 11/8 | 1998 Venezuelan parliamentary election | Venezuela | | Q5828549 |
| 11/8 | 59th Kikuka ShoJapan第59回菊花賞 | Japan | Place: Kyoto Racecourse | Q139505812 |
| 11/8 | Portuguese regionalisation referendum, 1998国民投票 | Portugal | | Q7232796 |
| 11/9 | 1998 Bermudian general election | United Kingdom | | Q4892710 |
| 11/10 | 1998 Israeli municipal elections | Israel | | Q111662420 |
| 11/12 | 1998 MTV Europe Music Awards | Unknown | Place: Forum di Milano | Q2760898 |
| 11/12 | murder of Katarzyna Zowada | Unknown | | Q24947040 |
| 11/13 | 26th Annie Awards第26回アニー賞 | United States | | Q11851756 |
| 11/14 | 1998 Prague municipal election | Czech Republic | | Q11932242 |
| 11/15 | 1998 Burkinabé presidential election | Burkina Faso | | Q4999068 |
| 11/15 | 1998 Okinawa gubernatorial electionJapan1998年沖縄県知事選挙 | Japan | | Q11186229 |
| 11/19 | 1994 Prague municipal election | Czech Republic | | Q11932234 |
| 11/19 | 1998 Ninglang earthquake | Unknown | | Q4593861 |
| 11/22 | Albanian constitutional referendum, 19981998年アルバニア憲法国民投票 | Albania | | Q4709192 |
| 11/22 | Trentino-Alto Adige/Südtirol regional election, 1998 | Italy | | Q3722669 |
| 11/22 | Coca-Cola 500Japan | Japan | Place: Mobility Resort Motegi | Q5139056 |
| 11/22 | World War 3 | United States | | Q28453382 |
| 11/22 | 1998 Central African parliamentary election | Central African Republic | | Q5060290 |
| 11/24 | 1998 Lebanese presidential election | Lebanon | | Q55616699 |
| 11/25 | 1998 Rajasthan Legislative Assembly election | India | | Q107366012 |
| 11/25 | 1998 Mizoram Legislative Assembly election | India | | Q107740109 |
| 11/25 | 1998 Delhi Legislative Assembly election | India | | Q17051585 |
| 11/26 | Miss World 1998ミス・ワールド1998 | Unknown | Place: Grand Egyptian Museum | Q627930 |
| 11/26 | Japan–China Joint Declaration on Building a Partnership of Friendship and Cooperation for Peace and Development平和と発展のための友好協力パートナーシップの構築に関する日中共同宣言 | Unknown | | Q6159220 |
| 11/26 | Khanna rail disasterカンナ鉄道事故 | India | | Q6400364 |
| 11/27 | 1998 Madhya Pradesh Legislative Assembly election | India | | Q55621685 |
| 11/29 | 1998 North Maluku earthquake | Indonesia | | Q111942431 |
| 11/29 | 1998 Scottish League Cup Final | Unknown | Place: Celtic Park | Q4484685 |
| 11/30 | 1998 Syrian parliamentary election | Syria | | Q945266 |
| 11/30 | 1998 Quebec general election | Canada | | Q3586425 |
| 12/1 | December 19981998年12月 | Unknown | | Q5248959 |
| 12/1 | Deaths in December 1998訃報 1998年12月 | Unknown | | Q10844182 |
| 12/1 | 1998–99 Four Hills Tournament | Unknown | Place: Schattenberg Ski Jump | Q829820 |
| 12/1 | 1998 Baltica Cup | Russia | | Q11039514 |
| 12/1 | 1998 NHK TrophyJapan1998年NHK杯国際フィギュアスケート競技大会 | Japan | Place: Makomanai Ice Arena | Q2582748 |
| 12/1 | Liquidity Aid of Bank Indonesia | Indonesia | | Q12474592 |
| 12/1 | 1999 French Figure Skating Championships | France | Place: patinoire Charlemagne | Q2955056 |
| 12/2 | Recognition of Customary Marriages Act, 1998 | Unknown | | Q17010157 |
| 12/3 | December 3, 1998 Albanian–Yugoslav border clash | Unknown | Place: Albania-Yugoslavia border | Q21187498 |
| 12/4 | 11th European Film Awards第11回ヨーロッパ映画賞 | Unknown | Place: The Old Vic | Q2405223 |
| 12/5 | 1993 Gabonese presidential election1993年ガボン大統領選挙 | Gabon | | Q3586576 |
| 12/5 | 1998 Taiwanese legislative election第四回中華民国立法委員選挙 | Taiwan | | Q5974090 |
| 12/5 | Wladimir Klitschko vs. Ross Puritty | Ukraine | Place: Palace of Sports | Q58479894 |
| 12/6 | 1998 Venezuelan presidential election1998年ベネズエラ大統領選挙 | Venezuela | | Q8883 |
| 12/6 | 1998 Gabonese presidential election1998年ガボン大統領選挙 | Gabon | | Q3586577 |
| 12/6 | 1998 Northern Cyprus parliamentary election | Northern Cyprus | | Q6086936 |
| 12/8 | Tadjena massacre | Algeria | | Q14476275 |
| 12/11 | Thai Airways International Flight 261タイ国際航空261便墜落事故 | Thailand | Place: Surat Thani | Q612396 |
| 12/11 | 1998 St. Cloud explosion | United States | | Q4593991 |
| 12/12 | 35th Golden Horse Film Awards第35回金馬奨 | Taiwan | Place: National Dr. Sun Yat-sen Memorial Hall | Q15900113 |
| 12/12 | ECW/FMW SupershowJapan | Japan | | Q16966736 |
| 12/12 | December 12, 19981998年12月12日 | Unknown | | Q69302496 |
| 12/13 | Rock Bottom: In Your House | Unknown | | Q3939679 |
| 12/13 | Puerto Rican status referendum, 1998 | United States | Place: Puerto Rico | Q7258660 |
| 12/13 | 1998 Central African parliamentary election | Central African Republic | | Q5060290 |
| 12/14 | Panda Bar massacre | Federal Republic of Yugoslavia | Place: Peja | Q3850895 |
| 12/14 | December 14, 1998 Albanian–Yugoslav border ambush | Unknown | Place: Albania-Yugoslavia border | Q21187497 |
| 12/14 | 1998 Guinean presidential election1998年ギニア大統領選挙 | Guinea | | Q2115009 |
| 12/14 | 40th Ariel Awards | Mexico | Place: Mexico City | Q30594768 |
| 12/15 | 3rd Lumière Awards第3回リュミエール賞 | France | Place: Paris | Q2816585 |
| 12/17 | 1998 Slovak presidential election1998年スロバキア共和国大統領選挙 | Slovakia | | Q12778816 |
| 12/18 | basketball at the 1998 Asian Games – women | Unknown | Place: Thammasat Stadium | Q104853003 |
| 12/22 | Operation Desert Thunder | Unknown | Place: Persian Gulf | Q3354687 |
| 12/28 | December 1998 tourist kidnappings in Yemen | Unknown | | Q127260212 |
| 12/30 | Al-Qaeda insurgency in Yemenイエメンでのアルカーイダの反乱 | Yemen | Place: Shabwah Governorate | Q286436 |
| 12/31 | 49th NHK Kōhaku Uta GassenJapan第49回NHK紅白歌合戦 | Japan | | Q11601251 |