The Intercounty Baseball League (IBL) is a Canadian baseball league, comprising teams of college players and former professionals from North America and beyond. The teams are located in Southern Ontario.

The league was formed in 1919 and has enjoyed much success over its long history.^[1] Teams are run similar to a professional minor-league team, providing players an opportunity to play under the same conditions, using wooden bats and minor-league specification baseballs. Teams play 42 scheduled games from early May to late-August. The playoffs are best-of-five series with the championship series typically played around Labour Day. The most recent champions are the Welland Jackfish, who defeated the Barrie Baycats 4-2 in the 2023 Dominico Cup Final.

The Intercounty Baseball League (IBL) was founded in 1919 with just four cities represented — Galt, Guelph, Stratford and Kitchener, and is the oldest amateur men's league in Canada.^[2] During the early years, the league expanded to include the cities of Waterloo, Brantford, Preston, London, and St. Thomas.

It was previously known as the Intercounty Major Baseball League and the Senior Intercounty Baseball League. Teams compete for the Jack and Lynne Dominico Trophy, which is awarded to the league champions. The trophy is named for the late owners of the Toronto Maple Leafs baseball team, husband and wife Jack and Lynne Dominico.

* a game between Toronto and Kitchener on August 15, was rained out and not made up due to the game not having any effects on the standings

Source:^[4]

The winning team is awarded the Jack and Lynne Dominico Cup.

Other awards presented include:

• Rawlings IBL Player of the Year Award/John Bell Memorial Trophy
• IBL Rookie of the Year/Brian Kerr Memorial Trophy

This sports-related list is incomplete; you can help by adding missing items. (August 2008)

† Player is an inductee of the Canadian Baseball Hall of Fame

• Bob Ferguson, league statistician (1958 to 1966) and owner of the London Pontiacs (1963 to 1964)^[5]