1930–31 Idaho Vandals men's basketball team

The 1930–31 Idaho Vandals men's basketball team represented the University of Idaho during the 1930–31 NCAA college basketball season. Members of the Pacific Coast Conference, the Vandals were led by fourth-year head coach Rich Fox and played their home games on campus at Memorial Gymnasium in Moscow, Idaho.

The Vandals were 4–19 overall and 1–15 in conference play.