CSAC logo.
The Colonial States Athletic Conference (CSAC) is an NCAA Division III collegiate athletic conference in the Mid-Atlantic United States. There are currently nine full member institutions as of 2018. The conference's membership, as with most Middle Atlantic conferences, was shaken as a result of the formation of the Landmark Conference and its ensuing domino effect. The conference, founded in 1992 as the Pennsylvania Athletic Conference, changed its name in 2008.
The CSAC experienced another shakeup in 2018 when five members departed the conference to join with two other institutions to form a new Division III conference that eventually became the Atlantic East Conference. In July 2018, the CSAC added two new members. The conference added its 10th member on July 1, 2019 and its 11th on the same day in 2020, but was reduced to 10 members when on June 18, 2021, Centenary University published its move to Atlantic East, effective July 1 that year, but its lacrosse teams would start competing in their new conference's 2022 season.