The 2018–19 UMass Lowell River Hawks men's basketball team represented the University of Massachusetts Lowell in the 2018–19 NCAA Division I men's basketball season.

The River Hawks split their home games between the Costello Athletic Center and the Tsongas Center, both of which are located in Lowell, Massachusetts, and they were led by sixth-year head coach Pat Duquette.

They lost in the quarterfinals of the America East tournament to Hartford.

The River Hawks finished the 2017–18 season 12–18, 6–10 in the America East Conference play, to finish in a tie for sixth place.

In the America East tournament, they were defeated by UMBC in the quarterfinals.