The 1998 Boise State Broncos football team represented Boise State University in the 1998 NCAA Division I-A football season.

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

Led by first-year head coach Dirk Koetter, Boise State was 6–5 overall and 2–3 in conference play.

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