Cornell University has won the most ECAC men's hockey championships with 13, followed by Harvard at 11, and Quinnipiac, which joined the league in 2005, with seven.

The Big Red won their second title in 1970 to complete the first and thus far only undefeated campaign in NCAA Division I men's ice hockey history, this time with a 6-4 victory over Clarkson.

ECAC Hockey completed back-to-back titles when Boston University won the 1971 championship with a 4-2 victory over Minnesota.

The Terriers then made it two in a row for their school and three straight for ECAC Hockey when they repeated as champions in 1972 with a 4-0 victory over Cornell.

In June 1983, concerns that the Ivy League schools were potentially leaving the conference and disagreements over schedule length versus academics caused Boston University, Boston College, Providence, Northeastern and New Hampshire to decide to leave the ECAC to form what would become Hockey East, which began play in the 1984–85 season.

[3] This left the ECAC with twelve teams (Army, Brown, Clarkson, Colgate, Cornell, Dartmouth, Harvard, Princeton, RPI, St. Lawrence, Vermont, and Yale).

Army would stay in the conference until the end of the 1990–91 season, at which point they became independent (they now play in Atlantic Hockey) and were replaced by Union College.

Harvard won its first and thus-far only NCAA Division I Hockey Championship when the Crimson topped Minnesota, 4-3 in overtime at the 1989 Tournament.

After finishing runner up again in 2016, Quinnipiac finally broke through to win their first title at the 2023 Tournament with a 3-2 overtime victory over Minnesota.

[4] ECAC teams won two of the three pre-NCAA American Women's College Hockey Alliance national championships, New Hampshire winning in 1998 and Harvard in 1999.