The 2004 International League season took place between April and September 2004.

The Buffalo Bisons defeated the Richmond Braves to win the league championship.

Attendance

• Buffalo - 604,159
• Charlotte - 265,271
• Columbus - 493,656
• Durham - 493,629
• Indianapolis - 576,067
• Louisville - 648,092
• Norfolk - 485,260
• Ottawa - 159,619
• Pawtucket - 657,067
• Richmond - 375,029
• Rochester - 437,088
• Scranton/W.B. - 402,676
• Syracuse - 364,648
• Toledo - 544,778

Playoffs

The following teams qualified for the postseason: Buffalo Bisons, Columbus Clippers, Durham Bulls, and Richmond Braves.

Division Series

Buffalo defeated Durham 3 games to 2

Richmond defeated Columbus 3 game to 1

Championship series

Buffalo defeated the Richmond Braves 3 games to 1 Note: all games were played in Buffalo due to weather conditions (the remnants of Hurricane Ivan) in Richmond.