| Event: | Swimming |
| Competition: | 1963 Mediterranean Games |
| Venue: | Piscina Felice Scandone |
| Location: | Naples, Italy |
| Dates: | 21–29 September 1963 |
| Previous: | 1959 |
| Next: | 1967 |
The swimming competition at the 1963 Mediterranean Games was held in Naples, Italy.
| 100 m freestyle | 56.3 | 58.2 | 58.4 | ||||
| 400 m freestyle | 4:31.9 | 4:33.6 | 4:34.7 | ||||
| 1500 m freestyle | 17:59.3 | 18:16.7 | 18:18.7 | ||||
| 200 m backstroke | 2:21.2 | 2:21.7 | 2:21.9 | ||||
| 200 m breaststroke | 2:40.8 | 2:44.5 | 2:44.5 | ||||
| 200 m butterfly | 2:18.7 | 2:20.3 | 2:20.9 | ||||
| 4 × 200 m freestyle relay | 8:28.3 | 8:28.5 | 8:41.9 | ||||
| 4 × 100 m medley relay | 4:13.2 | 4:15.1 | 4:17.1 |