The 2005 Atlantic Hockey Tournament took place between March 8 and March 19, 2005. The regular season champions were the Quinnipiac Bobcats. They won the right to play the winner of the play-in game between the two lowest seeds. The seeds for the tournament were: * 1. Quinnipiac * 2. Canisius * 3. Mercyhurst * 4. Holy Cross * 5. Sacred Heart * 6. Connecticut * 7. Bentley * 8. Army * 9. American International