The 2025 ECAC Hockey men's tournament was the 64th tournament in league history. It was played between March 7 and March 22, 2025. By winning the tournament, Cornell received ECAC Hockey's automatic bid to the 2025 NCAA Division I men's ice hockey tournament.
The tournament features four rounds of play. The teams that finish above fifth place in the standings received a bye to the quarterfinal round. In the first round, the fifth and twelfth seeds, the sixth and eleventh seeds, the seventh and tenth seeds and the eighth and ninth seeds played a single-elimination game with the winners advancing to the quarterfinals. In the quarterfinals the one seed played the lowest remaining seed, the second seed played the second-lowest remaining seed, the third seed played the third-lowest remaining seed and the fourth seed played the fourth-lowest remaining seed each in a best-of-three series with the winners of these the series advancing to the semifinals. In the semifinals the top remaining seed played the lowest remaining seed while the two remaining teams play against each other. The winners of the semifinals play in the championship game, and no third-place game is played. All series after the quarterfinals are single-elimination games. The tournament champion receives an automatic bid to the 2024 NCAA Division I men's ice hockey tournament.
Teams are reseeded for the quarterfinal and semifinal rounds
<small>Note: * denotes overtime period(s)</small>
<small>Note: All game times are local.</small>
<nowiki>*</nowiki> Most Outstanding Player(s)