The 2018–19 George Washington Colonials men's basketball team represented George Washington University during the 2018–19 NCAA Division I men's basketball season.

The Colonials were led by third-year head coach Maurice Joseph and played their home games at the Charles E. Smith Center in Washington, D.C. as members of the Atlantic 10 Conference.

George Washington parted ways with Maurice Joseph on March 15, 2019 after three seasons and an overall record of 44–57.

[1] On March 21, the school hired Siena head coach Jamion Christian as the new head coach.

Sources: Street & Smith's Preseason Awards[3] Roster