The 2009–10 Lehigh Mountain Hawks men's basketball team represented Lehigh University during the 2009–10 NCAA Division I men's basketball season. The Mountain Hawks, led by third-year head coach Brett Reed, played their home games at Stabler Arena and were members of the Patriot League. They finished the season 22–11, 10–4 in Patriot League play to finish in first place in the conference.