1975 in sports

• Alpine Skiing World Cup
  • Men's overall season champion: Gustav Thöni, Italy
  • Women's overall season champion: Annemarie Pröll, Austria

• January 12 − Super Bowl IX: the Pittsburgh Steelers (AFC) won 16−6 over the Minnesota Vikings (NFC)
  • Location: Tulane Stadium
  • Attendance: 80,997
  • MVP: Franco Harris, FB (Pittsburgh)
• Birmingham Vulcans win the final season of WFL competition, had best overall record when league ceased after first twelve weeks of regular season.

• Brazil – Internacional wins the Campeonato Brasileiro
• England – the League Championship – Derby County took the title for the second time in four seasons, finishing two points clear of Liverpool and Ipswich Town.
• England – FA Cup – West Ham United beat Fulham 2–0 at Wembley Stadium in front of 100,000 people. Alan Taylor was the scorer of both goals.
• England – League Cup – Aston Villa beat Norwich City 1–0 at Wembley Stadium.
• European Cup – Bayern Munich defeated Leeds United 2–0 in a controversial final at the Parc des Princes, Paris.
• European Cup Winners' Cup – Dynamo Kiev beat Ferencvaros 3–0 in Basle, Switzerland.
• UEFA Cup – Borussia Mönchengladbach beat FC Twente 5–1 on aggregate, with a leg played at each team's home stadium.
• Ecuador – Ecuadorian Serie A Champions: Liga Deportiva Universitaria de Quito

• August 12 – New Zealand's John Walker set a new world record in Gothenburg, Sweden, becoming the first man to break 3:50 for the mile when he clocked 3:49.4.
• October – Athletics at the 1975 Pan American Games held in Mexico City

• Victorian Football League
  • North Melbourne wins the 79th VFL Premiership (North Melbourne 19.8 (122) d Hawthorn 9.13 (67))
  • Brownlow Medal awarded to Gary Dempsey (Footscray)
• South Australian National Football League:
  • August 23: Glenelg kick the all-time record score for a major Australian Rules competition, kicking 49.23 (317) to Central District's 11.13 (79). It beat the previous record by an amazing 91 points.

• January 23 – Slugger Ralph Kiner is inducted into the Baseball Hall of Fame.
• September 16 – Pirates second baseman Rennie Stennett ties Wilbert Robinson's ML record, set June 10, 1892, by going 7-for-7 in a 9-inning game. He scored five of his club's runs in a 22–0 massacre of the Cubs, a major-league record for the biggest score in a shutout game in the 20th century.
• World Series – Cincinnati Reds win 4 games to 3 over the Boston Red Sox. Often described as one of the most memorable of all World Series.

• April 9 – Asia's first professional basketball league, the Philippine Basketball Association played its first game at the Araneta Coliseum.
• Darryl Dawkins becomes the first NBA player drafted out of high school.
• NCAA Division I Men's Basketball Championship –
  • UCLA wins 92–85 over Kentucky in John Wooden's final game as Bruins coach.
• NBA Finals –
  • Golden State Warriors win 4 games to 0 over the Washington Bullets
• 1975 ABA Finals –
  • Kentucky Colonels defeat Indiana Pacers 4 games to 1

• October 1 in Manila, Philippines Muhammad Ali defeated Joe Frazier to maintain the Heavyweight Championship of the world. Known as the Thrilla In Manila, many regard it as the greatest fight in boxing history.

• Grey Cup – Edmonton Eskimos won 9–8 over the Montreal Alouettes
• Vanier Cup – Ottawa Gee-Gees won 14–9 over the Calgary Dinos

• 1975 Cricket World Cup, the first to be held. West Indies beat Australia by 17 runs.

• Giro d'Italia won by Fausto Bertoglio of Italy
• Tour de France – Bernard Thévenet of France
• UCI Road World Championships – Men's road race – Hennie Kuiper of Netherlands

• The first disc ultimate games in Canada are played as exhibition games at the Canadian Open Frisbee Championships on Toronto Islands.
• Ultimate is played as an exhibition of a new sport at the World Frisbee Championships (WFC) at the Rose Bowl in Pasadena, California.

• Iditarod Trail Sled Dog Race Champion –
  • Emmitt Peters won with lead dogs: Nugget & Digger

• Men's World Cup held in Kuala Lumpur and won by India
• 1975 Pan American Games men's competition held in Mexico City and won by Argentina

• World Figure Skating Championships –
  • Men's champion: Sergey Nikolayevich Volkov, Soviet Union
  • Ladies' champion: Dianne de Leeuw, Netherlands
  • Pair skating champions: Irina Rodnina & Alexander Zaitsev, Soviet Union
  • Ice dancing champions: Irina Moiseyeva & Andrei Minenkov, Soviet Union

Men's professional

• Masters Tournament – Jack Nicklaus
• U.S. Open – Lou Graham
• British Open – Tom Watson
• PGA Championship – Jack Nicklaus
• PGA Tour money leader – Jack Nicklaus – $298,149
• Ryder Cup – United States wins 21–11 over Britain & Ireland in team golf.

Men's amateur

• British Amateur – Vinny Giles
• U.S. Amateur – Fred Ridley

Women's professional

• LPGA Championship – Kathy Whitworth
• U.S. Women's Open – Sandra Palmer
• LPGA Tour money leader – Sandra Palmer – $76,374

• United States Pacing Triple Crown races –
  1. Cane Pace – Nero
  2. Little Brown Jug – Seatrain
  3. Messenger Stakes – Bret's Champ
• United States Trotting Triple Crown races –
  1. Hambletonian – Bonefish
  2. Yonkers Trot
  3. Kentucky Futurity
• Australian Inter Dominion Harness Racing Championship –
  • Pacers: Young Quinn

• footy July 6 – In what was billed as the "Battle of the Sexes", Kentucky Derby winner, Foolish Pleasure went head to head in a match race against the undefeated filly, Ruffian. In the lead, Ruffian broke a leg and, after an unsuccessful operation to save her, the horse widely believed to have been the greatest thoroughbred filly ever was humanely put down.

Steeplechases

• Cheltenham Gold Cup – Ten Up
• Grand National – L'Escargot

Flat races

• Australia – Melbourne Cup won by Think Big
• Canada – Queen's Plate won by L'Enjoleur
• France – Prix de l'Arc de Triomphe won by Star Appeal
• Ireland – Irish Derby Stakes won by Grundy
• English Triple Crown Races:
  1. 2,000 Guineas Stakes – Bolkonski
  2. The Derby – Grundy
  3. St. Leger Stakes – Bruni
• United States Triple Crown Races:
  1. Kentucky Derby – Foolish Pleasure
  2. Preakness Stakes – Master Derby
  3. Belmont Stakes – Avatar

• Art Ross Trophy as the NHL's leading scorer during the regular season: Bobby Orr, Boston Bruins.
• Hart Memorial Trophy for the NHL's Most Valuable Player: Bobby Clarke, Philadelphia Flyers
• Stanley Cup – Philadelphia Flyers defeat the Buffalo Sabres 4 games to 2
• World Hockey Championship –
  • Men's champion: Soviet Union defeated Czechoslovakia
• Avco World Trophy – Houston Aeros win 4 games to 0 over the Quebec Nordiques
• SM-liiga, the Finnish professional ice hockey league, launched its first season 1975–1976
• NCAA Men's Ice Hockey Championship – Michigan Technological University Huskies defeat University of Minnesota-Twin Cities Golden Gophers 6–1 in St. Louis, Missouri

• The National Lacrosse League of 1974 and 1975 play their 2nd and last season.
• The Quebec Caribous defeat the Montreal Québécois 4 games to 2 to win the National Lacrosse League (1974–75) Championship.
• The Vancouver Burrards win the Mann Cup.
• The Windsor Warlocks win the Founders Cup.
• The Peterborough Gray Munros win the Minto Cup.

• First Ski Orienteering World Championships held in Hyvinkää, Finland.

• 1975 Amco Cup
• 1975 European Rugby League Championship
• 1975 New Zealand rugby league season
• 1975 NSWRFL season
• 1975 Pacific Cup
• 1974–75 Northern Rugby Football League season / 1975–76 Northern Rugby Football League season
• 1975 Rugby League World Cup

• 81st Five Nations Championship series is won by Wales

• World Snooker Championship – Ray Reardon beats Eddie Charlton 31-30

• The second FINA World Championships held in Cali, Colombia

• Grand Slam in tennis men's results:
  1. Australian Open – John Newcombe
  2. French Open – Björn Borg
  3. Wimbledon championships – Arthur Ashe
  4. US Open – Manuel Orantes
• Grand Slam in tennis women's results:
  1. Australian Open – Evonne Goolagong
  2. French Open – Chris Evert
  3. Wimbledon championships – Billie Jean King
  4. US Open – Chris Evert
• Davis Cup – Sweden wins 3–2 over Czechoslovakia in world tennis.
• Eighteen-year-old Martina Navratilova of Czechoslovakia announces her defection to the United States

• Asian Men's Volleyball Championship held in Melbourne: won by Japan
• Asian Women's Volleyball Championship held in Melbourne: won by Japan
• Men and Women's European Volleyball Championship held in Yugoslavia: men's and women's tournaments both won by USSR
• Volleyball at the 1975 Pan American Games held in Mexico City: men's and women's tournaments both won by Cuba

• 1975 FINA Men's World Water Polo Championship held in Cali, Colombia, and won by USSR.

• Seventh Pan American Games held in Mexico City, Mexico
• Seventh Mediterranean Games held in Algiers, Algeria
• Eighth Summer Universiade held in Rome, Italy
• Eighth Winter Universiade held in Livigno, Italy

• Associated Press Male Athlete of the Year – Fred Lynn, Major League Baseball
• Associated Press Female Athlete of the Year – Chris Evert, Tennis