1945 in sports
| Years in sports: | 1942 1943 1944 1945 1946 1947 1948 |
| Centuries: | 19th century · 20th century · 21st century |
| Decades: | 1910s 1920s 1930s 1940s 1950s 1960s 1970s |
| Years: | 1942 1943 1944 1945 1946 1947 1948 |
Some sporting events did not take place because of World War II.
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- The twelfth South American Basketball Championship in Guayaquil is won by Brazil.
See, 1945 in chess
- Victorian Football League - Carlton wins the 49th VFL Premiership (Carlton 15.13 (103) d South Melbourne 10.15 (76))
- Cleveland Rams 15-14 Washington Redskins at Cleveland, Ohio to win the NFL championship. The Rams relocated after the season to Los Angeles.
- With the end of World War II, the FA Cup is reinstated for the 1945-46 season; played on a two-legged basis. However, clubs are not yet prepared for a full league programme, so the Football League does not resume; regional leagues remain for another year.
Men's professional
- Masters Tournament - not played due to World War II
- U.S. Open - not played due to World War II
- British Open - not played due to World War II
- July 15 - PGA Championship - Byron Nelson
- PGA Tour money leader - Byron Nelson - $63,336
Men's amateur
- British Amateur - not played due to World War II
- U.S. Amateur - not played due to World War II
Women's professional
- Women's Western Open - Babe Zaharias
- Titleholders Championship - not played due to World War II
- Associated Press Male Athlete of the Year: Byron Nelson, PGA golf
- Associated Press Female Athlete of the Year: Babe Didrikson Zaharias, LPGA golf
- January 1 — Jacky Ickx, Belgian racing car driver
- January 3 — Wade Bell, American middle distance runner
- January 10 — Jerome Drayton, German-born Canadian long-distance runner
- February 3 — Philip Waruinge, Kenyan boxer
- February 3 — Bob Griese, American football player
- February 5 — Nancy McCredie, Canadian track and field athlete
- February 25 — Roy Saari, American freestyle and medley swimmer
- February 26 — Peter Brock, Australian racing car driver (d. 2006)
- March 8 — Carol Moseke, American discus thrower
- March 16 — Vojtech Christov, Slovak football referee
- March 17 — Hassan Bchara, Lebanese wrestler
- March 17 — Dave Bailey, Canadian track and field athlete
- March 27 — Robert Haigh, Australian field hockey player
- March 28 — Johnny Famechon, France-born Australian boxer
- April 2 — Don Sutton, American baseball player
- April 3 — Bernie Parent, Hockey hall of famer
- April 10 — Kevin Berry, Australian butterfly swimmer (d. 2006)
- April 20 — Naftali Temu, Kenyan athlete (d. 2003)
- April 26 — Dick Johnson, Australian racing car driver
- May 12 — Alan Ball, English football (soccer) player
- May 12 — Carl Robie, American butterfly swimmer
- May 14 — Yochanan Vollach, Israeli football (soccer) player, President of Maccabi Haifa accosiation
- May 23 — Roel Luynenburg, Dutch rower
- June 1 — Brian Oldfield, American track and field athlete
- June 1 — Russell Webb, American water polo player
- June 3 — Hale Irwin, American golfer
- June 4 — John Sherwood, British track and field athlete
- June 5 — John Carlos, American track and field champion
- June 8 — Klenie Bimolt, Dutch swimmer
- June 12 — Pat Jennings, Northern Irish soccer goalkeeper
- June 16 — Pedro Chappe Garcia, Cuban basketball player (d. 2003)
- June 24 — Betty Stöve, Dutch female tennis player
- July 1 — Jane Cederqvist, Swedish freestyle swimmer
- July 21 — John Lowe, English darts player
- August 12 — Mary Stewart, Canadian freestyle swimmer
- August 15 — Gene Upshaw, American football player
- September 11 — Franz Beckenbauer, German footballer and coach
- September 29 — Nadezhda Chizhova, Russian athlete
- October 12 — Stanley Cole, American water polo player
- November 3 — Gerd Muller, German soccer player
- November 24 — Van Nelson, American long-distance runner
- November 11 — Al Bummy Davis, American lightweight and welterweight boxer (b. 1918)
