# List of former Middle Atlantic Conference members

The following is an incomplete list of former members of the U.S. college athletic league now known as the Middle Atlantic Conferences (MAC). This includes schools that were members under the MAC's previous identity as the Middle Atlantic States Collegiate Athletics Conference.
One school which had departed the conference has since re-joined: Stevens Institute of Technology, which competed in the MAC from 1922–23 to 1977–78, returned back since the 2019–20 school year, joining the MAC's Freedom Conference.

## List of former members
### Before the formation of the multiple leagues

| Institution | Location | Founded | Affiliation | Enrollment | Nickname | Joined | Left | Current conference |
| American University | Washington, D.C. | 1893 | Private | 12,442 | Eagles | 1965–66 | 1973–74 | Patriot |
| Bucknell University | Lewisburg, Pennsylvania | 1846 | Private | 3,655 | Bison | 1922–23 | 1973–74 | Patriot |
| Columbia University | Manhattan, New York City | 1754 | Private | 27,606 | Lions | 1938–39? | 1953–54 | Ivy |
| University of Delaware | Newark, Delaware | 1743 | Private, Public | 19,391 | Fightin' Blue Hens | 1922–23 | 1973–74 | Coastal (CAA) (Conference USA in 2025) |
| Dickinson College | Carlisle, Pennsylvania | 1773 | Private | 2,300 | Red Devils | 1924–25? | 1991–92 | Centennial |
| Drexel University | Philadelphia, Pennsylvania | 1891 | Private | 25,500 | Dragons | 1922–23 | 1973–74 | Coastal (CAA) |
| Franklin & Marshall College | Lancaster, Pennsylvania | 1787 | Private | 2,324 | Diplomats | 1922–23 | 1991–92 | Centennial |
| Gettysburg College | Gettysburg, Pennsylvania | 1832 | Private | 2,600 | Bullets | 1922–23 | 1991–92 | Centennial |
| Haverford College | Haverford, Pennsylvania | 1833 | Private | 1,190 | Fords | 1922–23 | 1991–92 | Centennial |
| Hofstra University | Hempstead, New York | 1935 | Private | 12,400 | Pride | 1951–52 | 1973–74 | Coastal (CAA) |
| Johns Hopkins University | Baltimore, Maryland | 1876 | Private | 5,326 | Blue Jays | 1945–46 | 1991–92 | Centennial |
| La Salle University | Philadelphia, Pennsylvania | 1863 | Private | 7,554 | Explorers | 1951–52 | 1973–74 | Atlantic 10 (A-10) |
| Lafayette College | Easton, Pennsylvania | 1826 | Private | 2,382 | Leopards | 1938–39? | 1973–74 | Patriot |
| Lehigh University | Bethlehem, Pennsylvania | 1865 | Private | 7,070 | Mountain Hawks | 1938–39? | 1973–74 | Patriot |
| Muhlenberg College | Allentown, Pennsylvania | 1848 | Private | 2,225 | Mules | 1922–23 | 1991–92 | Centennial |
| New York University | Lower Manhattan, New York City | 1831 | Private | 38,391 | Violets | 1922–23 | 1954–55 | UAA |
| University of Pennsylvania | Philadelphia, Pennsylvania | 1740 | Private | 21,329 | Quakers | 1938–39? | 1953–54 | Ivy |
| Princeton University | Princeton, New Jersey | 1746 | Private | 7,567 | Tigers | 1922–23 | 1953–54 | Ivy |
| Rider University | Lawrenceville, New Jersey | 1865 | Private | 5,790 | Broncs | 1965–66 | 1973–74 | Metro Atlantic (MAAC) |
| Rutgers University–New Brunswick | New Brunswick, New Jersey | 1766 | Public | 58,788 | Scarlet Knights | 1922–23 | 1961–62 | Big Ten |
| Saint Joseph's University | Wynnfield, Pennsylvania | 1851 | Private | 8,800 | Hawks | 1949–50 | 1973–74 | Atlantic 10 (A-10) |
| Seton Hall University | South Orange, New Jersey | 1856 | Private | 9,745 | Pirates | 1938–39? | 1955–56 | Big East |
| Swarthmore College | Swarthmore, Pennsylvania | 1864 | Private | 1,545 | Garnet | 1922–23 | 1991–92 | Centennial |
| Temple University | Philadelphia, Pennsylvania | 1884 | Public | 38,648 | Owls | 1938–39? | 1961–62 | The American |
| Upsala College | East Orange, New Jersey | 1893 | Private | 435 | Vikings | 1960–61 | 1994–95 | N/A |
| Ursinus College | Collegeville, Pennsylvania | 1869 | Private | 1,650 | Bears | 1938–39? | 1991–92 | Centennial |
| Wagner College | Staten Island, New York City | 1883 | Private | 2,400 | Seahawks | 1938–39? | 1974–75 | Northeast (NEC) |
| Washington College | Chestertown, Maryland | 1723 | Private | 1,450 | Shoremen (men's) Shorewomen (women's) | 1946–47 | 1991–92 | Centennial |
| West Chester University of Pennsylvania | West Chester, Pennsylvania | 1871 | Public | 14,950 | Golden Rams | 1938–39?; 1969–70 | 1950–51; 1973–74 | Pennsylvania (PSAC) |

#### Notes

* ↑ Represents the calendar year when fall sports competition begins.
* ↑ Represents the calendar year when spring sports competition ends.
* 1 2 3 4 5 6 7 8 9 10 11 This school left the MAC to become a charter member of the East Coast Conference in 1974.
* 1 2 3 4 5 6 7 8 9 10 11 Currently an NCAA Division I FCS athletic conference.
* 1 2 3 Non-football member.
* ↑ Delaware is officially chartered as a "privately governed, state-assisted" institution.
* 1 2 3 Currently an NCAA Division I FBS athletic conference.
* 1 2 3 4 5 6 7 8 9 This school left the MAC to become a charter member of the Centennial Conference in 1992.
* ↑ Johns Hopkins had dual athletic conference membership with the University Athletic Association from 1986–87 to 1991–92.
* 1 2 3 4 Currently an NCAA Division I non-football athletic conference.
* ↑ Upsala closed after the 1994–95 school year.
* ↑ Currently an NCAA Division II athletic conference.

### Since the formation of the multiple leagues

| Institution | Location | Founded | Affiliation | Enrollment | Nickname | Joined | Left | Current conference |
| Drew University | Madison, New Jersey | 1867 | Private | 2,369 | Rangers | 1968–69 | 2006–07 | Landmark |
| Elizabethtown College | Elizabethtown, Pennsylvania | 1899 | Private | 2,082 | Blue Jays | 1928–29 | 2013–14 | Landmark |
| Juniata College | Huntingdon, Pennsylvania | 1876 | Private | 1,619 | Eagles | 1938–39? | 2006–07 | Landmark |
| Lycoming College | Williamsport, Pennsylvania | 1812 | Private | 1,272 | Warriors | 1952–53 | 2022–23 | Landmark |
| Manhattanville College | Purchase, New York | 1841 | Private | 2,700 | Valiants | 2007–08 | 2018–19 | Skyline |
| Moravian College | Bethlehem, Pennsylvania | 1742 | Private | 1,564 | Greyhounds | 1945–46 | 2006–07 | Landmark |
| University of Scranton | Scranton, Pennsylvania | 1888 | Private | 6,034 | Royals | 1938–39? | 2006–07 | Landmark |
| Susquehanna University | Selinsgrove, Pennsylvania | 1858 | Private | 2,200 | Crusaders | 1922–23 | 2006–07 | Landmark |
| Wilkes University | Wilkes-Barre, Pennsylvania | 1933 | Private | 5,552 | Colonels | 1946–47 | 2022–23 | Landmark |

#### Notes

* ↑ Represents the calendar year when fall sports competition begins.
* ↑ Represents the calendar year when spring sports competition ends.
* 1 2 3 4 5 This school left the MAC to become a charter member of the Landmark Conference in 2007.
* 1 2 3 4 5 This school was a charter member of the MAC Freedom Conference when it began effective in the 1999–2000 school year.
* 1 2 3 4 This school was a charter member of the MAC Commonwealth Conference when it began effective in the 1999–2000 school year.