The 2018–19 Wagner Seahawks men's basketball team represented Wagner College during the 2018–19 NCAA Division I men's basketball season.

The Seahawks were led by seventh-year head coach Bashir Mason.

They played their home games at Spiro Sports Center on the school's Staten Island campus as members of the Northeast Conference.

In the NEC tournament, they defeated Central Connecticut and Robert Morris before losing to LIU Brooklyn in the championship game.

As a regular season conference champion who did not win their conference tournament, they received an invitation to the National Invitation Tournament, where they lost in the first round to Baylor.