The PAC was founded in 1955 by the presidents of
Western Reserve University (1955–1967, operating athletically as Adelbert College from 1967 to 1970),
Case Institute of Technology (1955–1970),
John Carroll University (1955–1989) and
Wayne State University (1955–1967). By 1958, the PAC expanded east to include
Allegheny College (1958–1984, 2022–),
Bethany College (1958–),
Thiel College (1958–) and
Washington & Jefferson College (1958–). Some former PAC member institutions are
Alfred University (1996–1998),
Carnegie Mellon University (1968–1990),
Eastern Michigan University (1962–1967) and
Hiram College (1971–1989, returning in 2025). In April 2019,
Franciscan University, which had joined the PAC as an associate member in the newly launched conference sports of men's and women's lacrosse for the 2018–19 school year, was unveiled as the effective replacement for Thomas More. Franciscan added five sports to its PAC membership for 2019–20—women's golf, men's and women's indoor track & field, and men's and women's outdoor track & field, and became a full conference member in 2020–21. Effective July 1, 2022, Allegheny College rejoined the PAC after a 38-year absence spent in the
North Coast Athletic Conference (NCAC). Allegheny remains an affiliate member of the NCAC in the sport of field hockey as the PAC does not sponsor the sport. On December 14, 2022, the PAC announced that it would add men's volleyball starting in 2024–25. At the time of announcement, the men's volleyball league was planned to start with six full members. Geneva, Saint Vincent, and Thiel were associate members of the
Allegheny Mountain Collegiate Conference; Bethany and Chatham were committed to adding men's volleyball in 2023–24; and Grove City was to add men's volleyball in 2024–25. On June 6, 2023, the PAC announced that its future men's volleyball league would also include former full member Hiram as a single-sport member for the 2025 spring season. On April 23, 2024, the PAC announced that Hiram would return to full PAC membership after an absence of 35 years. It joined for administrative purposes on July 1 of that year, coinciding with its becoming a men's volleyball associate member, but will not start conference competition in other sports until 2025–26. On Sept. 9, 2024, Carnegie Mellon announced that it will leave the PAC to join the
Centennial Conference as an associate football member in time for the 2025 fall season. On March 25, 2025, the PAC announced that
Saint Francis University would be reclassifying from the
Division I ranks and the
Northeast Conference and will compete in the PAC effective July 1, 2026. Saint Francis joined for administrative purposes on July 1, 2025, but will not be eligible for the NCAA tournaments until the 2029–30 academic year. The headquarters is located in
New Wilmington, Pennsylvania.
Timeline Source: • 1955 – In 1955, the Presidents' Athletic Conference (PAC) was founded. Charter members included
Case Institute of Technology,
John Carroll University,
Wayne University (now Wayne State University) and
Western Reserve University, beginning the 1955–56 academic year. • 1958 –
Allegheny College,
Bethany College of West Virginia,
Thiel College and
Washington & Jefferson College joined the PAC in the 1958–59 academic year. • 1962 –
Eastern Michigan University joined the PAC in the 1962–63 academic year. • 1967: • Eastern Michigan and Wayne State left the PAC after the 1966–67 academic year. • Case Tech and Western Reserve merged to form the newly named institution as Case Western Reserve University, beginning the 1967–68 academic year. The undergraduate student bodies remained separate, however, and both Case Tech and Adelbert College (the male undergraduate school of the former Western Reserve University) continued to field separate teams. • 1968 –
Carnegie Mellon University joined the PAC in the 1968–69 academic year. • 1970: • Case Tech and Western Reserve left the PAC after the 1969–70 academic year. •
Case Western Reserve University joined the PAC in the 1970–71 academic year. • 1971 –
Hiram College joined the PAC in the 1971–72 academic year. • 1984: • Allegheny and Case Western Reserve left the PAC to join part of forming the
North Coast Athletic Conference (NCAC) after the 1983–84 academic year. •
Grove City College joined the PAC in the 1984–85 academic year. • The PAC sponsors women's athletic championships for the first time, beginning the 1984–85 academic year. • 1989 – John Carroll and Hiram left the PAC to join the
Ohio Athletic Conference (OAC) after the 1988–89 academic year. • 1990: • Carnegie Mellon left the PAC to fully align with the
University Athletic Association (UAA) after the 1989–90 academic year. •
Waynesburg College (now Waynesburg University) joined the PAC in the 1990–91 academic year. • 1996 –
Alfred University joined the PAC in the 1996–97 academic year. • 1998 – Alfred left the PAC to join the
Empire Athletic Association (now the Empire 8 Athletic Conference or Empire 8) after the 1997–98 academic year. • 2000 –
Westminster College of Pennsylvania joined the PAC in the 2000–01 academic year. • 2005 –
Thomas More College (now Thomas More University) joined the PAC in the 2005–06 academic year. • 2006 –
Saint Vincent College joined the PAC in the 2006–07 academic year. • 2007 –
Geneva College and
Chatham University joined the PAC in the 2007–08 academic year. • 2014 – Carnegie Mellon and Case Western Reserve rejoined the PAC as affiliate members for football in the 2014 fall season (2014–15 academic year). • 2018: • Thomas More left the PAC to join the
American Collegiate Athletic Association (ACAA) after the 2017–18 academic year. It was an ACAA member for only one season, as it returned to the
National Association of Intercollegiate Athletics (NAIA), primarily as a member of the
Mid-South Conference (MSC), during the 2019–20 school year. •
Franciscan University of Steubenville joined the PAC as an affiliate member for men's and women's lacrosse in the 2019 spring season (2018–19 academic year). • 2019 – Franciscan added women's golf plus men's and women's indoor and outdoor track & field into its PAC affiliate membership in the 2019–20 academic year. • 2020 – Franciscan upgraded as a full member of the PAC for all sports in the 2020–21 academic year. • 2022 – Allegheny rejoined the PAC in the 2022–23 academic year. • 2024: • Hiram rejoined the PAC as an affiliate member for men's volleyball and men's wrestling in the 2024–25 academic year. • The PAC added men's volleyball starting in the 2025 spring season of the 2024–25 academic year. At the time of announcement, the men's volleyball league was planned to start with six full members. Geneva, Saint Vincent and Thiel were associate members of the
Allegheny Mountain Collegiate Conference (AMCC); Bethany and Chatham were committed to adding men's volleyball in 2023–24; and Grove City was to add men's volleyball in 2024–25. • 2025: • Hiram upgraded as a full member of the PAC, beginning the 2025–26 academic year (for full conference competition). It initially joined the PAC for administrative purposes for the 2024–25 school year. • Carnegie Mellon left the PAC as an affiliate member for football to join the
Centennial Conference on that sport after the 2024 fall season (2024–25 academic year). • 2026 –
Saint Francis University will join the PAC, beginning the 2026–27 academic year (for full conference competition). It initially joined the PAC for administrative purposes for the 2025–26 school year. ==Member schools==