The 2012–13 NCAA Division I men's ice hockey season began on October 6, 2012, and concluded with the 2013 NCAA Division I Men's Ice Hockey Tournament's championship game on April 13, 2013, at the Consol Energy Center in Pittsburgh, Pennsylvania. This was the 66th season in which an NCAA ice hockey championship was held and is the 119th year overall where an NCAA school fielded a team.

The 2013 ECAC Hockey Men's Ice Hockey Tournament was played between March 8 and March 23, 2013 at campus locations and at Boardwalk Hall in Atlantic City, New Jersey, United States. Union College was the winner of the tournament for the second year in a row and received the ECAC Hockey's automatic bid to the 2013 NCAA Division I Men's Ice Hockey Tournament.