The 2017–18 Idaho Vandals men's basketball team represented the University of Idaho during the 2017–18 NCAA Division I men's basketball season. The Vandals, led by tenth-year head coach Don Verlin, 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. They finished the season 22–9, 14–4 in Big Sky play to finish in second place. They lost in the quarterfinals of the Big Sky tournament to Southern Utah.