1977 in sports describes the year's events in world sport.
|Years in sports:||1974 1975 1976 1977 1978 1979 1980|
|Centuries:||19th century · 20th century · 21st century|
|Decades:||1940s 1950s 1960s 1970s 1980s 1990s 2000s|
|Years:||1974 1975 1976 1977 1978 1979 1980|
- January 9 − Super Bowl XI: the Oakland Raiders (AFC) won 32−14 over the Minnesota Vikings (NFC)
- October 9 - Eddie Brown sets NFL record for punt returns in a game (11).
- November 20 – Playing despite a 101 °F (38 °C) fever as a result of the flu, Chicago Bears running back Walter Payton sets a new single-game NFL rushing record, gaining 275 yards in a 10–7 victory over the Minnesota Vikings.
- December 11 – Tampa Bay Buccaneers in their second NFL season win their first ever game over the New Orleans Saints. The win ends their NFL record 26-game losing streak encompassing the entire 1976 season and the first 12 games in 1977.
- Sugar Bowl (1976 season):
- Liverpool dominate English and European football, winning both the European Cup and the Football League Championship, but they miss out on a "treble" by losing in the FA Cup final.
- January 18 – death of Luciano Re Cecconi (28), Lazio and Italy, who was shot during a hoax robbery
- October 1 - Pelé played the final game of his storied career at Giants Stadium in East Rutherford, New Jersey. He played the first half for his current club, the New York Cosmos, and the second half for his old Brazilian club Santos.
- Victorian Football League
- May 7: Hawthorn kick 25.41 (191) against St. Kilda. That score breaks by seven the record for the most behinds by a team in a match, and by six the most scoring shots. Neither record has been equalled.
- North Melbourne wins the 81st VFL Premiership (North Melbourne 9.22 (76) drew Collingwood Football Club 10.16 (76), replay North Melbourne 21.25 (151) d Collingwood 19.10 (124))
- Brownlow Medal awarded to Graham Teasdale (South Melbourne)
- January 19 – Ernie Banks is elected to the Baseball Hall of Fame in his first year of eligibility. He won back-to-back MVP awards, but is best remembered for his famous line, "Let's play two".
- Sparky Lyle breaks Ron Perranoski's major league record for left-handers of 179 career saves.
- The Major League Baseball expansion Seattle Mariners and Toronto Blue Jays make their debuts (both are American League teams). It would be the last expansion in MLB until 1993.
- World Series – The New York Yankees defeat the Los Angeles Dodgers. This is the Series in which Reggie Jackson becomes known as "Mr. October."
- After 13 years and 82 contests, including 14 title defences, World Middleweight Champion Carlos Monzón retired undefeated.
- 12–17 March, Melbourne - Centenary Test played between Australia and England to commemorate 100th anniversary of first Test match. Australia won by 45 runs, exactly the same margin as in the first Test match in 1877.
- World Series Cricket begins playing games in competition to official International Cricket Council sanctioned matches.
- Masters Tournament - Tom Watson
- U.S. Open - Hubert Green
- British Open - Tom Watson
- PGA Championship - Lanny Wadkins
- PGA Tour money leader - Tom Watson - $310,653
- Ryder Cup - United States won 12½ -7½ over Britain & Ireland in team golf. This was the last Ryder Cup to feature a side exclusively from the British Isles; the U.S. opponents in the next Ryder Cup, held in 1979 at White Sulphur Springs, West Virginia, would be drawn from all of Europe. The U.S.-Europe format has continued ever since.
- United States Pacing Triple Crown races –
- United States Trotting Triple Crown races –
- Australian Inter Dominion Harness Racing Championship –
- Pacers: Stanley Rio
- Australia – Melbourne Cup won by Gold and Black
- Canada – Queen's Plate won by Sound Reason
- France – Prix de l'Arc de Triomphe won by Alleged
- Ireland – Irish Derby Stakes won by The Minstrel
- English Triple Crown Races:
- United States Triple Crown Races:
- Art Ross Trophy as the NHL's leading scorer during the regular season: Guy Lafleur, Montreal Canadiens
- Hart Memorial Trophy for the NHL's Most Valuable Player: Guy Lafleur - Montreal Canadiens
- Stanley Cup – Montreal Canadiens defeat the Boston Bruins 4 games to 0.
- World Hockey Championship
- Men's champion: Czechoslovakia defeated Sweden
- Junior Men's champion: Soviet Union defeated Canada
- Avco World Trophy - Quebec Nordiques won 4 games to 3 over the Winnipeg Jets
- 1977 Amco Cup
- 1977 European Rugby League Championship
- 1977 New Zealand rugby league season
- 1976–77 Northern Rugby Football League season / 1977–78 Northern Rugby Football League season
- 1977 NSWRFL season - St George and Parramatta draw 9–9 in the Grand Final. St George takes the title by winning the replay 22–0.
- 1977 Pacific Cup
- 1977 Rugby League World Cup
- Grand Slam in tennis men's results:
- Grand Slam in tennis women's results:
- Davis Cup – Australia won 3–1 over Italy in world tennis.