List of Hockey East men's ice hockey tournament champions

Hockey East is an NCAA Division I ice hockey-only conference based in Wakefield, Massachusetts, that was formed in 1984 after five Eastern College Athletic Conference teams decided to create their own league over scheduling concerns. At the end of each regular season, it holds the Hockey East Men's Ice Hockey Tournament to determine its conference champion. Since 1988, the winner of the conference tournament has been awarded the Lamoriello Trophy, named after the first commissioner of Hockey East, Lou Lamoriello.

The tournament was first hosted at the Providence Civic Centre (now called the Amica Mutual Pavilion) in Providence, Rhode Island, with Providence winning the inaugural tournament. Boston College has won the most Hockey East Men's Ice Hockey Tournaments with eleven and has the most championship game appearances with sixteen. Jerry York has coached nine championship teams and has the most championship game appearances with eleven. Shawn Walsh has made the most consecutive championship appearances with seven (1987–1993).

The TD Garden (formerly the FleetCenter) has hosted the tournament since 1996. The Boston Garden hosted the tournament seven times, while the Providence Civic Center and Kelley Rink each hosted the tournament twice. In 2021, the Mullins Center served as host for the championship game, as all tournament games were held on campus locations due to the COVID-19 pandemic. Massachusetts earned the right to host the title game as the higher seed of the two semifinal winners.

2016 was the first Championship in which at least one of the "Big 4" schools (Boston College, Boston University, Maine and New Hampshire) did not play in the title game.

Performance by team
The code in each cell represents the furthest the team made it in the respective tournament:
 * Team not in Hockey East
 * Preliminary / First round (2 teams in 1995, 4 teams in 2021, 8 teams from 2015 to 2015, 6 teams in 2014, 2018 and from 2022 onward.)
 * Quarterfinals (6 teams from 1985 to 1986, 4 teams from 1987 to 1989, 8 teams afterwards)
 * Semifinals
 * Finals
 * Champion

Note: the 2020 tournament was cancelled prior to the start of the quarterfinal round. Note: Merrimack was forced to withdraw from the 2021 due to a positive COVID-19 test.