2005–06 Idaho Vandals men's basketball team

The 2005–06 Idaho Vandals men's basketball team represented the University of Idaho during the 2005–06 NCAA Division I men's basketball season. New members of the Western Athletic Conference (WAC), the Vandals were led by fifth-year head coach Leonard Perry and played their home games on campus at Cowan Spectrum in Moscow, Idaho.

The Vandals were 4–24 overall in the regular season and 1–15 in conference play, eighth in the standings.

They drew top seed and host Nevada in the quarterfinal of the conference tournament in Reno and lost to the Wolf Pack by thirteen points. Perry was fired shortly after the game, and assistant George Pfeifer was promoted to head coach in late March.

Postseason result
!colspan=5 style=| WAC Tournament