The 2023 Idaho Vandals football team represented the University of Idaho in the Big Sky Conference during the 2023 NCAA Division I FCS football season.

Led by second-year head coach Jason Eck, the Vandals were 8–3 (6–2 in Big Sky, 2nd) in the regular season, and played their home games on campus at the Kibbie Dome in Moscow, Idaho.

Seeded fourth in the 24-team FCS playoffs, Idaho received a bye in the first round and hosted two games, but fell in the quarterfinals to Albany to finish at 9–4 (.692).

On July 23, 2023, during the virtual Big Sky Kickoff, the Vandals were predicted to finish fifth in the Big Sky by the coaches and second by the media.

at Roos Field • Cheney, WA at Mustang Memorial Field • San Luis Obispo, CA at Kibbie Dome • Moscow, ID at Kibbie Dome • Moscow, ID at Nottingham Field • Greeley, CO at Stewart Stadium • Ogden, UT at Kibbie Dome • Moscow, ID