| 1945 NCAA swimming and diving championships | |
| Hostcity: | Ann Arbor, Michigan |
| Dates: | March 1945 |
| Venues: | Intramural Sports Building University of Michigan |
| Teams: | 13 |
| Events: | 11 |
| Previous: | 1944 |
| Next: | 1946 |
The 1945 NCAA swimming and diving championships were contested in March 1945 at the Intramural Sports Building at the University of Michigan in Ann Arbor, Michigan at the ninth annual NCAA-sanctioned swim meet to determine the team and individual national champions of men's collegiate swimming and diving among its member programs in the United States.
Ohio State topped hosts, and rivals, Michigan in the team standings, the second team national title for the Buckeyes.[1]
| Ohio State | 56 | |
| Michigan (H) | 48 | |
| 25 | ||
| 24 | ||
| Minnesota | ||
| 10 | ||
| Canisius | 8 | |
| Northwestern | ||
| Princeton | ||
| Indiana | 6 | |
| 3 | ||
| 2 | ||
| RPI |
| 50-yard freestyle | Michigan | 23.2 | ||
| 100-yard freestyle | Michigan | 52.3 | ||
| 220-yard freestyle | Eugene Rogers (DC) | Columbia | 2:14.6 | |
| 440-yard freestyle | Ohio State | 4:55.4 | ||
| 1,500-meter freestyle | Ohio State | 20:11.4 | ||
| 150-yard backstroke | Princeton | 1:41.8 | ||
| 200-yard butterfly | Cornell | 2:31.2 | ||
| 400-yard freestyle relay | Michigan (DC) | 3:39.8 | ||
| 300-yard medley relay | Michigan | 3:05.2 |
| One-meter diving | Ohio State | 121.90 | ||
| Three-meter diving | Ohio State | 132.10 |