Robert Morris University Illinois competes in NAIA Division I.
| Name | Participants | |
|---|---|---|
| Men | Women | |
| Baseball | 131 | 0 |
| Basketball | 125 | 71 |
| Football | 187 | 0 |
| Golf | 18 | 7 |
| Lacrosse | 32 | 23 |
| Soccer | 93 | 82 |
| Softball | 0 | 40 |
| Tennis | 0 | 8 |
| Track and Field, Indoor | 39 | 34 |
| Track and Field, Outdoor | 29 | 29 |
| Track and Field, X-Country | 18 | 23 |
| Volleyball | 26 | 53 |
| Bowling | 49 | 57 |