Ohio Athletic Conference, also known as OAC, is a non-profit organization headquartered in the US. Founded in 1902, the conference operates as an intercollegiate athletic conference competing in the NCAA's Division III. All of its member institutions are located in Ohio. It holds the distinction of being the third oldest athletic conference in the United States, having had 31 schools as members throughout its history. Currently, the conference comprises nine member institutions whose enrollments range from approximately 1,000 to 4,500 students. Bethany Dannelly serves as its current commissioner.