| 1943 NCAA swimming and diving championships | |
| Hostcity: | Columbus, Ohio |
| Dates: | March 1943 |
| Venues: | Ohio State Natatorium Ohio State University |
| Teams: | 15 |
| Events: | 11 |
| Previous: | 1942 |
| Next: | 1944 |
The 1943 NCAA swimming and diving championships were contested in March 1943 at the Ohio State Natatorium at Ohio State University in Columbus, Ohio as the seventh 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.
Hosts Ohio State topped the team standings, the Buckeyes' first title in program history. Ohio State had finished in second or third place in each of the previous six championships.[1]
| Ohio State (H) | 81 | |
| 47 | ||
| 13 | ||
| 10 | ||
| Pacific | 8 | |
| 6 | ||
| Northwestern | ||
| Princeton | ||
| Stanford | ||
| Texas A&M | 5 | |
| Washington | ||
| Michigan State | 4 | |
| Purdue | 2 | |
| California | 1 | |
| Penn State |
| 50-yard freestyle | Northwestern | 22.1 | ||
| 100-yard freestyle | Michigan | 52.0 | ||
| 220-yard freestyle | Ohio State | 2:09.8 | ||
| 440-yard freestyle | Ohio State | 4:43.2 | ||
| 1,500-meter freestyle | Ohio State | 19:18.6 | ||
| 150-yard backstroke | Michigan | 1:33.5 | ||
| 200-yard butterfly | Stanford | 2:27.4 | ||
| 400-yard freestyle relay | Michigan (DC) | 3:31.1 | ||
| 300-yard medley relay | Michigan | 2:53.4 |
| One-meter diving | Frank Dempsey (DC) | Ohio State | 141.12 | |
| Three-meter diving | Frank Dempsey (DC) | Ohio State | 155.68 |