2002–03 Idaho Vandals men's basketball team

The 2002–03 Idaho Vandals men's basketball team represented the University of Idaho during the 2002–03 NCAA Division I men's basketball season. Members of the Big West Conference, the Vandals were led by second-year head coach Leonard Perry and played their home games on campus at Cowan Spectrum in Moscow, Idaho.

The Vandals were 13–14 overall in the regular season and 9–9 in conference play, fifth in the standings.

They met fourth seed Cal Poly in the first round of the conference tournament in Anaheim; although Idaho swept the regular season series, they lost to the Mustangs by four points.

Postseason result
!colspan=6 style=| Big West tournament