The 2018 Idaho State Bengals football team represented Idaho State University as a member of the Big Sky Conference during the 2018 NCAA Division I FCS football season.

Led by second-year head coach Rob Phenicie, the Bengals compiled an overall record of 6–5 with a mark of 5–3 in conference play, tying for fourth place in the Big Sky.

Idaho State played their home games at Holt Arena in Pocatello, Idaho.

On July 16, 2018 during the Big Sky Kickoff in Spokane, Washington, the Bengals were predicted to finish in twelfth place in the coaches poll and tenth place in the media poll.

[1] The Bengals had one player selected to the Preseason All-Conference Team.