Colby College competes in NCAA Division III (with football).
| Name | Participants | |
|---|---|---|
| Men | Women | |
| Baseball | 34 | 0 |
| Basketball | 19 | 14 |
| Field Hockey | 0 | 25 |
| Football | 76 | 0 |
| Golf | 12 | 0 |
| Ice Hockey | 27 | 24 |
| Lacrosse | 46 | 30 |
| Rowing | 28 | 41 |
| Skiing | 20 | 16 |
| Soccer | 33 | 26 |
| Softball | 0 | 18 |
| Squash | 13 | 10 |
| Swimming and Diving | 16 | 24 |
| Tennis | 14 | 9 |
| Track and Field, Indoor | 48 | 54 |
| Track and Field, Outdoor | 47 | 45 |
| Track and Field, X-Country | 36 | 32 |
| Volleyball | 0 | 16 |