The 2019–20 Idaho Vandals men's basketball team represented the University of Idaho in the 2019–20 NCAA Division I men's basketball season.

The Vandals, led by interim head coach Zac Claus, played their home games at the Cowan Spectrum, with a few early season games at Memorial Gym, in Moscow, Idaho, as members of the Big Sky Conference.

In the Big Sky Conference tournament, they lost to Montana State in the first round.

[1] On June 14, it was announced that head coach Don Verlin's contract would be terminated, effectively ending his tenure with the Vandals.

[2] Four days later, on June 18, assistant coach Zac Claus was named interim head coach.