2005 Big East Conference baseball tournament

The 2005 Big East Conference baseball tournament was held at Commerce Bank Ballpark in Bridgewater, New Jersey. This was the twenty first annual Big East Conference baseball tournament and last to be held at Commerce Bank Ballpark. The won their fourth tournament championship in a row and claimed the Big East Conference's automatic bid to the 2005 NCAA Division I baseball tournament. Notre Dame would go on to win five championships in a row.

Format and seeding
The Big East baseball tournament was a 4 team double elimination tournament in 2005. The top four regular season finishers were seeded one through four based on conference winning percentage only.

Jack Kaiser Award
Matt Edwards was the winner of the 2005 Jack Kaiser Award. Edwards was a senior first baseman for the Notre Dame Fighting Irish.