Six Schools League
The Six Schools League is an athletic league composed of six New England prep schools. It was founded in 2015 as the Five Schools League by Phillips Exeter Academy, Phillips Academy Andover, Choate Rosemary Hall, Deerfield Academy, and Northfield Mount Hermon School. The league aims to quell aggressive athletic recruiting among member schools, as well as support friendly competition.
Starting with the 2017–2018 school year, St. Paul's School joined the Six Schools League.
| School | Location | Colors | Team name | Established | Enrollment | Joined FSL | Rivals |
| Phillips Exeter Academy | Exeter, NH | Big Red | 1781 | 1,079 | 2015 | Andover | |
| Phillips Academy | Andover, MA | Big Blue | 1778 | 1,122 | 2015 | Exeter | |
| Deerfield Academy | Deerfield, MA | Big Green | 1797 | 650 | 2015 | Choate | |
| Choate Rosemary Hall | Wallingford, CT | Wild Boars | 1890 | 865 | 2015 | Deerfield | |
| Northfield Mount Hermon School | Gill, MA | Hoggers | 1879 | 655 | 2015 | ||
| St. Paul's School | Concord, NH | Pelicans Big Red | 1856 | 531 | 2017 |