Crestline High School is a proud member of the Mid-Buckeye Conference. Conference rivals include Loudonville, Lucas, Kidron Central Christian, Mansfield Christian, and Mansfield St. Peter's. Conference members compete in Volleyball, Cross Country, Soccer, Basketball, Baseball, Softball, and Track & Field. Several Mid-Buckeye Conference Schools also sponsor football, tennis, golf, bowling, and swimming. Crestview High School and Mapleton High School are participating members of the Mid-Buckeye Conference in Girls Soccer.