The 2018–19 Harvard Crimson men's basketball team represented Harvard University in the 2018–19 NCAA Division I men's basketball season.

They played their home games at the Lavietes Pavilion in Boston, Massachusetts and were led by 12th-year head coach Tommy Amaker.

1 seed in the Ivy Tournament, they defeated Penn in the semifinals before losing to Yale in the final.

The Crimson finished the 2017–18 season 18–14, 12–2 in Ivy League play to share the Ivy League regular season championship with Penn.

1 seed in the Ivy League tournament, they defeated Cornell in the semifinals before losing to Penn in the championship game.