1971 ECAC Hockey men's ice hockey tournament

The 1971 ECAC Hockey Men's Ice Hockey Tournament was the 10th tournament in league history. It was played in the Northeastern United States between March 9 and March 13, 1971. Quarterfinal games were played at home team campus sites, while the 'final four' games were played at the Boston Garden in Boston, Massachusetts. By reaching the championship game Harvard was invited to participate in the 1971 NCAA Division I Men's Ice Hockey Tournament. Clarkson, however, was passed over with Boston University chosen instead as the second eastern representative.

Format
The tournament featured three rounds of play, all of which were single-elimination. The top eight teams, based on winning percentage, qualified to participate in the tournament. In the quarterfinals the first seed and eighth seed, the second seed and seventh seed, the third seed and sixth seed and the fourth seed and fifth seed played against one another. In the semifinals, the highest seed plays the lowest remaining seed while the two remaining teams play with the winners advancing to the championship game and the losers advancing to the third place game.

Conference standings
''Note: GP = Games played; W = Wins; L = Losses; T = Ties; Pct. = Winning percentage; GF = Goals for; GA = Goals against''

Bracket
Teams are reseeded after the first round

Note: * denotes overtime period(s)

First Team
* Most Outstanding Player(s)
 * F Dave Hynes* (Harvard)
 * F John Halme (Clarkson)
 * F Joe Cavanagh (Harvard)
 * D Jim Higgs (Cornell)
 * D Steve Warr (Clarkson)
 * G Bruce Bullock (Clarkson)

Second Team

 * F Steve Stirling (Boston University)
 * F Jerry Kemp (Clarkson)
 * F Larry Fullan (Cornell)
 * D Bob Brown (Boston University)
 * D Ric Jordan (Boston University)
 * G Bruce Durno (Harvard)