The 2018–19 Marquette Golden Eagles men's basketball team represented Marquette University in the 2018–19 NCAA Division I men's basketball season.

The Golden Eagles, led by fifth-year head coach Steve Wojciechowski, played their home games for the first time at Fiserv Forum as members of the Big East Conference.

In the Big East tournament, they defeated St John’s in the Quarterfinals before losing to Seton Hall in the semifinals.

They received an at-large bid to the NCAA Tournament where they were upset by Murray State in the First Round.

They received an at-large bid to the National Invitation Tournament where they defeated Harvard in the first round and Oregon in the second round before losing to Penn State in the quarterfinals.