The Commonwealth Athletic Conference (CAC) is a high school athletic conference in District A of the Massachusetts Interscholastic Athletic Association (MIAA).
The following sports are supported by the Commonwealth Athletic Conference.
| Fall | Winter | Spring | |
|---|---|---|---|
| Cross Country | Basketball | Baseball | |
| Field Hockey | Girls Gymnastics | Lacrosse | |
| Boys Golf | Ice Hockey | Softball | |
| Soccer | Indoor Track | Tennis | |
| Girls Swimming | Boys Swimming | Outdoor Track | |
| Girls Volleyball | Wrestling |
The following twelve schools are a member of the Commonwealth Athletic Conference.[1]
| School | Location | Colors | Type | Mascot |
|---|---|---|---|---|
| Private K-12 | Lancers | |||
| Black & Orange | Public Secondary | Reggies | ||
| Navy Blue & Gold | Public Secondary | Gryphons | ||
| Red, White, and Blue | Public Secondary | Hawks | ||
| KIPP Academy Lynn Collegiate High School | Blue & Black | Charter 9-12 | Panthers | |
| Lowell Catholic High School | Lowell, Massachusetts | Navy Blue and Green | Public K-12 | Crusaders |
| Navy Blue & Red | Public Secondary | Tigers | ||
| Navy Blue & Gold | Public Secondary | Revolution | ||
| Mystic Valley Regional Charter School | Maroon & Gold | Public K-12 | Eagles | |
| Nashoba Valley Technical High School | Westford, Massachusetts | Navy Blue & Blue | Public Secondary | Vikings |
| Black & Gold | Public Secondary | Golden Knights | ||
| Purple, Black & White | Public Secondary | Rams | ||
| Maroon & Gold | Public Secondary | Wildcats | ||
| School | Location | Type | Left | Mascot | |
|---|---|---|---|---|---|
| public secondary | Red Devils | ||||
| public secondary | 2014 | Rams | |||
| public secondary | Hawks | ||||
| Fellowship Christian Academy | private secondary | ||||
| public secondary | 2014 | Bulldogs | |||
| Pope John XXIII High School | Everett, Massachusetts | private catholic secondary | Tigers | ||
| private secondary | 2020 | Panthers | |||
| private catholic secondary | Spartans | ||||
| public secondary | Tigers |