Independent School League (Boston Area) Members Members

| School | Mascot | Location_ | Founded | Entered_ISL | Grades | Number_of_Students | Varsity_Teams |
|---|---|---|---|---|---|---|---|
| Belmont Hill School | No Mascot (Sextant is school symbol) | Belmont, MA | 1923 | 1948 | 7-12 | 420 Boys | 16 |
| Brooks School | Bishops | North Andover, MA | 1926 | 1948 | 9-12 | 368 | 22 |
| Buckingham Browne & Nichols | Knights | Cambridge, MA | 1883 | 1948 | pre-K-12 | 997 | 16 |
| Governor`s Academy | Red Dogs | Byfield, MA | 1763 | 1948 | 9-12 | 376 | 20 |
| Groton School | Zebras | Groton, MA | 1884 | 1972 | 8-12 | 352 | 19 |
| Lawrence Academy at Groton | Spartans | Groton, MA | 1793 | 1973 | 9-12 | 375 | 22 |
| Middlesex School | Zebras | Concord, MA | 1901 | 1968 | 9-12 | 350 | 24 |
| Milton Academy | Mustangs | Milton, MA | 1798 | 1948 | K-12 | 680 | 25 |