The 2005–06 Utah State Aggies men's basketball team represented Utah State University in the 2005–06 college basketball season.

This was head coach Stew Morrill's 8th season at Utah State.

The Aggies played their home games at the Dee Glen Smith Spectrum and were members of the Big West Conference.

They lost to Nevada in the championship game of the WAC tournament, but received an at-large bid to the 2006 NCAA Division I men's basketball tournament as No.

5 seed Washington in the opening round.