The Circle City Conference or CCC is a high school athletic conference located in Indianapolis, Indiana. All of the schools are members of the Indiana High School Athletic Association. The conference started competition at the beginning of the 2016–2017 school year following a crackdown by the IHSAA on several of the state's Catholic schools that were scheduling games against numerous teams located outside the state of Indiana. ^[1] The first sporting event in the conference was a boy's varsity tennis match between Brebeuf Jesuit and Guerin Catholic that took place on August 18, 2016. The Golden Eagles defeated the Braves 4–1. As of August 2015, Greg VanSlambrook is the president of the conference.^[2] Combined, the schools have accounted for 85 IHSAA state championships.

The conference currently consists of five coeducational private schools; four Catholic schools and one nondenominational Christian school in Greater Indianapolis. Heritage Christian will be departing for the Indiana Crossroads Conference in July of 2025.

The Indiana High School Athletic Association has awarded the schools the following state championships while they were members of the CCC: