Colonial States Athletic Conference men's basketball tournament

The Colonial States Athletic Conference men's basketball tournament was the annual conference basketball championship tournament for the NCAA Division III Colonial States Athletic Conference. The tournament was held annually from 1994 to 2023, when the CSAC completed its merger into the United East Conference. All CSAC members at the time of the merger therefore became eligible for future iterations of the United East Men's Basketball Championship.

The tournament was single-elimination with seeding based on regular season records.

Prior to 2008, when the CSAC was known as the Pennsylvania Athletic Conference, the event was known as the Pennsylvania Athletic Conference men's basketball tournament.

The winner, declared conference champion, received the CSAC's automatic bid to the NCAA Men's Division III Basketball Championship.

Championship records

 * Schools highlighted in pink departed the CSAC before it merged with the United East in 2023.
 * Among the CSAC teams during its final season, Bryn Athyn, Clarks Summit, Saint Elizabeth, and Valley Forge never qualified for the tournament finals.
 * Among the teams that departed the CSAC before its final season, Eastern and Marywood never reached the finals.