The Associated Southern Colleges (ASC) is an association of private schools in the Australian Capital Territory and New South Wales, Australia that share common interests, ethics, educational philosophy and contest sporting events between themselves.
| School | Location | Enrolment | Founded | Denomination | Boys/Girls | Day/Boarding | School Colours |
|---|---|---|---|---|---|---|---|
| Burgmann Anglican School | Gungahlin | 1998 | Anglican | Boys & Girls | Day | Green, White & Blue | |
| Canberra Girls' Grammar School | Deakin | 1450 | 1926 | Anglican | Girls | Day & Boarding | Green, Red & Blue |
| Canberra Grammar School | Red Hill | 1570 | 1929 | Anglican | Boys | Day & Boarding | Navy Blue & Sky Blue |
| Daramalan College | Dickson | 1440 | 1962 | Roman Catholic | Boys & Girls | Day | Red & Black |
| Marist College Canberra | Pearce | 1622 | 1968 | Roman Catholic | Boys | Day | Sky Blue & Royal Blue |
| Merici College | Braddon | 1000 | 1959 | Roman Catholic | Girls | Day | |
| Radford College | Bruce | 1984 | Anglican | Boys & Girls | Day | Maroon, White, Navy and Sky Blue | |
| St Clare's College | Griffith | 1200 | 1965 | Roman Catholic | Girls | Day | Maroon, White, Grey and Blue |
| St Edmunds's College | Griffith | 1954 | Roman Catholic | Boys | Day | Blue, White and Gold | |
| Trinity Catholic College, Goulburn | Goulburn | 2000 | Roman Catholic | Boys & Girls | Day |
ASC schools usually compete against club teams as well as fellow ASC schools most sports.