The 2018–19 Colgate Raiders men's basketball team represented Colgate University during the 2018–19 NCAA Division I men's basketball season.

The Raiders, led by eighth-year head coach Matt Langel, played their home games at Cotterell Court in Hamilton, New York as members of the Patriot League.

In the Patriot League tournament, they defeated Boston University, Navy, and Bucknell to win the Patriot League tournament.

As a result, they received an automatic bid to the NCAA Tournament where they lost in the first round to Tennessee.

They defeated Lafayette and Holy Cross to advance to the championship game of the Patriot League tournament where they lost to Bucknell.