The 2020–21 Merrimack Warriors men's basketball team represented Merrimack College in the 2020–21 NCAA Division I men's basketball season.

The Warriors, led by fifth-year head coach Joe Gallo, played their home games at Hammel Court in North Andover, Massachusetts as second-year members of the Northeast Conference (NEC).

The Warriors finished the 2019–20 season 20–11, 14–4 in NEC play to finish as NEC regular season champions.

In doing so, they became the first program in NCAA men's basketball history to win an outright conference regular season title in its first season of Division I reclassification.

However, the CIT, and all postseason tournaments, were cancelled amid the COVID-19 pandemic.