MAC Commonwealth Conference

The MAC Commonwealth, in full Middle Atlantic Conference Commonwealth, is an intercollegiate athletic conference affiliated with the NCAA's Division III. It is one of the three conferences that operate under the umbrella of the Middle Atlantic Conferences; the others being the MAC Freedom and the Middle Atlantic Conference, a grouping used for some sports that consists of MAC Commonwealth and MAC Freedom schools. Member institutions are located in Pennsylvania and Maryland.

Member schools
The conference has had two significant membership changes in the 2020s. First, the MAC announced in April 2019 that York College of Pennsylvania would join from the Capital Athletic Conference in 2020. The following month, the MAC announced that upon York's arrival, the MAC Commonwealth and MAC Freedom would be realigned so that each would have 9 members. Eastern moved from the MAC Freedom to the MAC Commonwealth, while Arcadia and Lycoming moved in the opposite direction. Then in 2023, Lycoming and Wilkes left both the MAC Freedom and the overall MAC, leading the MAC to move Lebanon Valley from MAC Commonwealth to MAC Freedom in order to balance the membership numbers.

Current members
The MAC Commonwealth currently has eight full members, all are private schools:


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Enrollment source:

Former members
The MAC Commonwealth had six former full members, all were private schools:


 * Notes:

Sports
The MAC Commonwealth sponsors intercollegiate athletic competition in men's baseball, men's and women's basketball, women's field hockey, men's golf, men's and women’s soccer, women's softball, men's and women's tennis, and women's volleyball. In addition, members also compete in the Middle Atlantic Conference in men's and women's cross country, men's football, men's and women's ice hockey, men's and women's lacrosse, men's and women's swimming, men's and women's indoor and outdoor track and field, men's volleyball, and men's wrestling.