The 2005 Open Canada Cup was the 8th edition of the Canadian Professional Soccer League's open league cup tournament running from late May through early September.

[1] The victory marked Windsor's second Open Canada Cup title, and became the third club in the tournaments history to successfully defend their title.

[2] Particularly the 2004 Open Canada Cup runner's up Ottawa St. Anthony Italia, and 2004 Canadian National Challenge Cup finalists and Ontario Cup champions Ottawa Royals S.C.[3] The Ontario amateur clubs began the tournament in the preliminary rounds while the CPSL clubs received an automatic bye to the second round.

For the fourth straight year London City were granted the hosting rights to the finals.

All CPSL clubs competed in the competition with the exception of Toronto Croatia which opted out in order to compete in the annual Croatian-North American Soccer Tournament.