The 1976–77 Idaho State Bengals men's basketball team represented Idaho State University during the 1976–77 NCAA Division I men's basketball season. The Bengals were led by sixth-year head coach Jim Killingsworth and played their home games on campus at the ISU Minidome in Pocatello. Led by seven-foot (2.13 m) senior center Steve Hayes, they finished the regular season at 21–4 overall, with a 13–1 record in the Big Sky Conference. In the Elite Eight game (regional final) against UNLV, ISU led by a point at halftime, but lost by seventeen and ended the season at 25–5.