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:| Institution | Location | Founded | Affiliation | Enrollment | Nickname | Joined | Football? |
| Albright College | Reading, Pennsylvania | 1856 | Methodist | 2,304 | Lions | 1945 | Yes |
| Alvernia University | Reading, Pennsylvania | 1958 | Catholic | 2,872 | Golden Wolves | 2009 | Yes |
| Eastern University | St. Davids, Pennsylvania | 1952 | Baptist | 3,420 | Eagles | 2020 | Yes |
| Hood College | Frederick, Maryland | 1893 | Reformed | 1,174 | Blazers | 2012 | No |
| Messiah University | Grantham, Pennsylvania | 1909 | Christian | 3,305 | Falcons | 1983 | No |
| Stevenson University | Stevenson, Maryland | 1947 | Nonsectarian | 3,621 | Mustangs | 2012 | Yes |
| Widener University | Chester, Pennsylvania | 1821 | Nonsectarian | 6,402 | Pride | 1946 | Yes |
| York College of Pennsylvania | York, Pennsylvania | 1787 | Nonsectarian | 5,564 | Spartans | 2020 | No |
;Notes:
Enrollment source:
Future members
The MAC Commonwealth will have one future full member, a private school:| Institution | Location | Founded | Affiliation | Enrollment | Nickname | Joining | Previous conference |
| Neumann University | Aston, Pennsylvania | 1965 | Catholic | 3,000 | Knights | 2026 | Atlantic East |
;Notes:
Former members
The MAC Commonwealth had six former full members, all were private schools:| Institution | Location | Founded | Affiliation | Enrollment | Nickname | Joined | Left | Current conference | Football? |
| Arcadia University | Glenside, Pennsylvania | 1853 | Presbyterian | 2,473 | Knights | 2008 | 2020 | MAC Freedom | No |
| Elizabethtown College | Elizabethtown, Pennsylvania | 1899 | Church of the Brethren | 2,416 | Blue Jays | 1928 | 2014 | Landmark | No |
| Juniata College | Huntingdon, Pennsylvania | 1876 | Church of the Brethren | 1,449 | Eagles | 1938 | 2007 | Landmark | Yes |
| Lebanon Valley College | Annville, Pennsylvania | 1866 | Methodist | 1,712 | Flying Dutchmen | 1945 | 2023 | MAC Freedom | Yes |
| Lycoming College | Williamsport, Pennsylvania | 1812 | Methodist | 1,272 | Warriors | 2007 | 2020 | Landmark | Yes |
| Moravian College | Bethlehem, Pennsylvania | 1742 | Moravian | 1,792 | Greyhounds | 1945 | 2007 | Landmark | Yes |
| Susquehanna University | Selinsgrove, Pennsylvania | 1858 | Lutheran | 1,900 | Crusaders | 1922 | 2007 | Landmark | Yes |
;Notes:
Membership timeline
DateFormat = yyyy
ImageSize = width:1000 height:auto barincrement:20
Period = from:1999 till:2030
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PlotArea = right:5 left:5 bottom:40 top:5
Colors =
id:line value:black
id:bg value:white
id:Full value:rgb # Use this color to denote a team that is a member in all sports
id:FullxF value:rgb # Use this color to denote a team that is a member in all sports except for football
id:AssocF value:rgb # Use this color to denote a team that is a member for football only
id:AssocOS value:rgb # Use this color to denote a team that is a member for another sport only
id:OtherC1 value:rgb # Use this color to denote a team that has moved in another conference
id:OtherC2 value:rgb # Use this color to denote a team that has moved in another conference when the other color has already been used
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bar:1 color:Full from:1999 till:end text:Albright
bar:2 color:FullxF from:1999 till:2014 text:Elizabethtown
bar:2 color:OtherC1 from:2014 till:end text:MAC Freedom
bar:3 color:Full from:1999 till:2007 text:Juniata
bar:3 color:OtherC1 from:2007 till:end text:Landmark
bar:4 color:Full from:1999 till:2023 text:Lebanon Valley
bar:4 color:OtherC1 from:2023 till:end text:MAC Freedom
bar:5 color:FullxF from:1999 till:end text:Messiah
bar:6 color:Full from:1999 till:2007 text:Moravian
bar:6 color:OtherC1 from:2007 till:end text:Landmark
bar:7 color:Full from:1999 till:2007 text:Susquehanna
bar:7 color:OtherC1 from:2007 till:end text:Landmark
bar:8 color:Full from:1999 till:end text:Widener
bar:9 color:Full from:2007 till:2020 text:Lycoming
bar:9 color:OtherC1 from:2020 till:2023 text:MAC Freedom
bar:9 color:OtherC2 from:2023 till:end text:Landmark
bar:10 color:FullxF from:2008 till:2020 text:Arcadia
bar:10 color:OtherC1 from:2020 till:end text:MAC Freedom
bar:11 color:FullxF from:2009 till:end text:Alvernia
bar:12 color:FullxF from:2012 till:end text:Hood
bar:13 color:Full from:2012 till:end text:Stevenson
bar:14 color:FullxF from:2020 till:2023 text:Eastern
bar:14 color:Full from:2023 till:end text:
bar:15 color:FullxF from:2020 till:end text:York
bar:16 color:FullxF from:2026 till:end text:Neumann
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text:^"MAC Commonwealth Conference membership history"
- > If the chart uses more than one bar color, add a legend by selecting the appropriate fields from the following three options Leave a blank line after the end of the timeline, then add a line with the selected values from the list, separated by a space.