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

The Eagles, led by sixth-year head coach Mike Brennan, played their home games at Bender Arena in Washington, D.C. as members of the Patriot League.

They finished the season 15–15, 9–9 in Patriot League play to finish in fourth place.

They lost in the quarterfinals of the Patriot League tournament to Navy.

They lost in the first round of the Patriot League tournament to Lafayette.