The 2015 ECAC Hockey Men's Ice Hockey Tournament was the 54th tournament in league history. It was played between March 6 and March 21, 2015. First Round and Quarterfinal games were played at home team campus sites, while the final four games were played at the Herb Brooks Arena in Lake Placid, New York. By winning the tournament, the Harvard Crimson received the ECAC's automatic bid to the 2015 NCAA Division I Men's Ice Hockey Tournament.

ECAC Hockey is one of the six conferences that compete in NCAA Division I ice hockey. The conference used to be affiliated with the Eastern College Athletic Conference, a consortium of over 300 colleges in the eastern United States. This relationship ended in 2004; however, the ECAC abbreviation was retained in the name of the hockey conference. ECAC Hockey is the only ice hockey conference with identical memberships in both its women's and men's divisions. Cornell has won the most ECAC men's hockey championships with 13, followed by Harvard at 11. Quinnipiac, which joined the league in 2005, already has 7 regular season championships. ECAC Hockey teams have won 10 NCAA Division I Men's Ice Hockey Championships, most recently in 2023.