Lacrosse
- February 22 – National Lacrosse League – The East Division All-Stars defeat the West Division All-Stars 19-15 in the All Star Game.
- May 7 – National Lacrosse League – Calgary Roughnecks defeat Buffalo Bandits 14-11 to win Champion's Cup
- May 30 – LeMoyne College defeats Limestone 11-10 (2OT) for first Division II National Championship.
- August – European Lacrosse Championships
- Men's – England defeats Germany
- Women's – Wales A defeats Scotland A
- August 22 – Major League Lacrosse – Philadelphia Barrage defeat Boston Cannons 13-11 to win league championship at Boston
- Clarington Green Gaels win the Founders Cup
- Peterborough Lakers win the Mann Cup
- Burnaby Lakers win the Minto Cup
Read more about this topic: 2004 In Sports