The 2012 ECAC Hockey Men's Ice Hockey Tournament was played between March 2 and March 17, 2012 at campus locations and at Boardwalk Hall in Atlantic City, New Jersey, United States. The winner of the tournament received ECAC Hockey's automatic bid to the 2012 NCAA Division I Men's Ice Hockey Tournament.
The tournament features four rounds of play. In the first round, the fifth and twelfth, sixth and eleventh, seventh and tenth, and eighth and ninth seeds as determined by the final regular season standings play a best-of-three series, with the winner advancing to the quarterfinals. There, the first seed and lowest-ranked first-round winner, the second seed and second-lowest-ranked first-round winner, the third seed and second-highest-ranked first-round winner, and the fourth seed and highest-ranked first-round winner play a best-of-three series, with the winner advancing to the semifinals. In the semifinals, the highest and lowest seeds and second-highest and second-lowest seeds play a single game, with the winner advancing to the championship game and the loser advancing to the third-place game. The tournament champion receives an automatic bid to the 2012 NCAA Men's Division I Ice Hockey Tournament.
Note: GP = Games Played; W = Wins; L = Losses; T = Ties; PTS = Points; GF = Goals For; GA = Goals Against
<small>Note: * denotes overtime period(s)</small>
<nowiki>*</nowiki> Most Outstanding Player(s)