The 2011–12 Lehigh Mountain Hawks men's basketball team represented Lehigh University during the 2011–12 NCAA Division I men's basketball season.

The Mountain Hawks, led by fifth-year head coach Brett Reed, played their home games at Stabler Arena and were members of the Patriot League.

Following the regular season, Lehigh won the Patriot League Basketball tournament to earn the conference's automatic bid into the 2012 NCAA tournament.

This was their fifth NCAA Tournament appearance with their last coming in 2010.

This is the last time as of 2023 that a Patriot League team has won an NCAA tournament game.