The 2020–21 Mercyhurst Lakers men's ice hockey season was the 34th season of play for the program, the 22nd at the Division I level, and the 18th season in the Atlantic Hockey conference. The Lakers represented Mercyhurst University and were coached by Rick Gotkin, in his 33rd season. The start of the college hockey season was delayed due to the ongoing coronavirus pandemic. As a result, Mercyhurst's first scheduled game was in mid-November as opposed to early-October, which was the norm.