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|Years in sports|
1990 in sports describes the year's events in world sport.
- January 1 – Sugar Bowl (1989 season):
- January 28 – Super Bowl XXIV – San Francisco 49ers won 55-10 over the Denver Broncos
- November 11 – Derrick Thomas has 7 sacks for Kansas City Chiefs against Seattle Seahawks.
- West Germany won the Football World Cup in Rome, Italy, defeating defending champion Argentina 1-0 in the final.
- Ecuador – Ecuadorian Serie A Champions: Liga Deportiva Universitaria de Quito
- 1990 Commonwealth Games held in Auckland, New Zealand
- 1990 European Athletics Championships held in Split, SR Croatia, Yugoslavia
- Australian Football League
- March 17 – Taiwan Professional Baseball League, a first official game held.
- June 11 – Nolan Ryan of the Texas Rangers pitched a no-hitter against the Oakland Athletics.
- The Cincinnati Reds sweep the Oakland A's in the World Series.
- Ira Smith becomes the first player in NCAA history to win consecutive batting titles after hitting .519 with the Maryland Eastern Shore Hawks.
National Basketball League (Australia) Finals
- UNLV wins the NCAA Division I Men's championship
- Yugoslavia wins the FIBA World Championship.
- March 4 – American player Hank Gathers died after collapsing during the semifinals of a West Coast Conference Tournament game.
- February 11 – Buster Douglas defeated Mike Tyson by a knockout in round 10 to win the world's unified Heavyweight title, in what many consider boxing's biggest upset ever.
- March 31 – Thunder Meets Lightning: Julio César Chávez defeated Meldrick Taylor to unify boxing's world junior welterweight title
- September 22 to October 7 – Asian Games held in Beijing, China
- November 24 to December 3 – Central American and Caribbean Games held in Mexico City
- Grey Cup – Winnipeg Blue Bombers 50-11 over the Edmonton Eskimos
- Vanier Cup – Saskatchewan Huskies win 24-21 over the St. Mary's Huskies
- Giro d'Italia won by Gianni Bugno of Italy
- Tour de France – Greg LeMond of the United States
- UCI Road World Championships – Men's road race – Rudy Dhaenens of Belgium
- Phil Taylor (darts player) wins his first world title
- Men's World Cup held in Lahore won by the Netherlands
- Men's Champions Trophy held in Melbourne won by Australia
- Women's World Cup held in Sydney won by the Netherlands
- World Figure Skating Championships –
- Gaelic football
- Ladies' Gaelic football
- Masters Tournament – Nick Faldo
- U.S. Open – Hale Irwin
- British Open – Nick Faldo
- PGA Championship – Wayne Grady
- PGA Tour money leader – Greg Norman – $1,165,477
- Senior PGA Tour money leader – Lee Trevino – $1,190,518
- Nabisco Dinah Shore – Betsy King
- U.S. Women's Open – Betsy King
- LPGA Championship – Beth Daniel
- Classique du Maurier – Cathy Johnston-Forbes
- LPGA Tour money leader – Beth Daniel – $863,578
- The inaugural Solheim Cup match was won by the United States who beat Europe 11½ – 4½
- North America Cup – Apaches Fame
- United States Pacing Triple Crown races –
- United States Trotting Triple Crown races –
- Australian Inter Dominion Harness Racing Championship –
- Australia – Melbourne Cup won by Kingston Rule
- Canadian Triple Crown Races:
- For the second straight year, a horse sweeps the series.
- France – Prix de l'Arc de Triomphe won by Saumarez
- Ireland – Irish Derby Stakes won by Salsabil
- Japan – Japan Cup won by Better Loosen Up
- English Triple Crown Races:
- United States Triple Crown Races:
- Breeders' Cup World Thoroughbred Championships:
- Art Ross Trophy as the NHL's leading scorer during the regular season: Wayne Gretzky, Los Angeles Kings
- Hart Memorial Trophy for the NHL's Most Valuable Player: Mark Messier, Edmonton Oilers
- Stanley Cup – Edmonton Oilers won 4 games to 1 over the Boston Bruins
- World Hockey Championship
- Men's champion: Soviet Union defeated Sweden
- Junior Men's champion: Canada defeated Soviet Union
- Women's champion: in the inaugural event, Canada defeated United States
- The 6th World Lacrosse Championship is held in Perth, Australia. The United States win, and Canada is the runner-up.
- The Philadelphia Wings beat the New England Blazers 17-7 in the Major Indoor Lacrosse League Championship.
- The Brooklin Redmen win the Mann Cup.
- Orangeville wins the Founders Cup.
- The St. Catharines Athletics win the Minto Cup.
- The first World Radiosport Team Championship held in Seattle, United States Gold medals won by John Dorr K1AR and Doug Grant K1DG of the United States.
- Fifth Amateur Radio Direction Finding World Championship held in Štrbské Pleso, Czechoslovakia (now Slovakia).
- 1990–91 French Championship season
- 1990 Kangaroo tour of Great Britain and France
- 1990 New Zealand rugby league season
- 1990 NSWRL season
- 1990 Pacific Cup
- 1989–90 Rugby Football League season / 1990–91 Rugby Football League season
- 1990 State of Origin series
- 1989–1992 Rugby League World Cup
- World Snooker Championship – Stephen Hendry beats Jimmy White 18-12
- World rankings – Stephen Hendry becomes world number one for 1990/91
- March 24 – Tom Jager betters his own world record (22.12) in the 50m freestyle (long course) twice at a swimming meet in Nashville, Tennessee, swimming 21.98 in the heats and 21.81 in the final.
- Grand Slam in tennis men's results:
- Grand Slam in tennis women's results:
- Davis Cup – United States won 3-2 over Australia in world tennis.
- ITU World Championships held in Orlando, United States
- ETU European Championships held in Linz, Austria
- FIVB World League 1990 held in Osaka, Japan won by Italy
- 1990 FIVB Men's World Championship held in Rio de Janeiro won by Italy
- 1990 FIVB Women's World Championship held in Beijing won by USSR
- Asian Games held in Beijing, China
- Winter Asian Games held in Sapporo, Japan
- Central American and Caribbean Games held in Mexico City, Mexico
- Commonwealth Games held in Auckland
- Summer Goodwill Games held in Seattle, United States
- Associated Press Male Athlete of the Year – Joe Montana, National Football League
- Associated Press Female Athlete of the Year – Beth Daniel, LPGA golf
- BBC Overseas Sports Personality of the Year – Mal Meninga, Australian rugby league footballer
- Jerardi, Dick (February 27, 2015). "Remembering Hank, 25 years later". Philadelphia Daily News. Retrieved November 13, 2019.