| Bob Nulf | |
| Birth Date: | 13 May 1985 |
| Death Date: | June 1985 (aged 81) |
| Alma Mater: | Butler University University of Illinois |
| Coach Sport1: | Football |
| Coach Years2: | 1942–1948 |
| Coach Team2: | Kalamazoo |
| Coach Sport3: | Basketball |
| Coach Years4: | 1942–1943 |
| Coach Team4: | Kalamazoo |
| Coach Years5: | 1945–1946 |
| Coach Team5: | Kalamazoo |
| Admin Years1: | 1942–1949 |
| Admin Team1: | Kalamazoo |
| Overall Record: | 18–10–4 (football) 13–20 (basketball) |
| Championships: | Football 2 MIAA (1946–1947) |
Robert W. Nulf (May 13, 1906 – June 1985) was an American football and basketball coach.
Nulf was the head football coach at Kalamazoo College in Kalamazoo, Michigan. He held that position for four seasons, from 1942 until 1948. His coaching record at Kalamazoo was 18–10–4. Kalamazoo did not field a football team from 1943 to 1945.[1]