The 1978 Boise State Broncos football team represented Boise State University in the 1978 NCAA Division I-AA football season.

The Broncos competed in the Big Sky Conference and played their home games on campus at Bronco Stadium in Boise, Idaho.

Led by third-year head coach Jim Criner, the Broncos were 7–4 overall and 3–3 in conference.

This was the first season for the newly created Division I-AA,[1] which the Big Sky joined.

Following this season, Boise State was put on probation for a scouting violation in November prior to the NAU game;[2][3][4] the Broncos were ineligible for the league title or the I-AA playoffs in 1979.