| Event: | Swimming |
| Competition: | 1955 Mediterranean Games |
| Location: | Barcelona, Spain |
| Dates: | 15–25 July 1955 |
| Previous: | 1951 |
| Next: | 1959 |
The swimming competition at the 1955 Mediterranean Games was held in Barcelona, Spain.
| 100 m freestyle | 59.7 | 60.2 | 60.4 | ||||
| 400 m freestyle | 4:42.2 | 4:42.4 | 4:49.5 | ||||
| 1500 m freestyle | 19:14.1 | 19:31.4 | 19:40.0 | ||||
| 100 m backstroke | 1:06.2 | 1:09.5 | 1:10.6 | ||||
| 200 m breaststroke | 2:47.8 | 2:52.3 | 2:52.3 | ||||
| 200 m butterfly | 2:41.7 | 2:44.3 | 2:44.9 | ||||
| 4 × 200 m freestyle relay | 9:03.8 | 9:13.3 | 9:19.4 | ||||
| 4 × 100 m medley relay | 4:35.8 | 4:43.4 | 4:47.0 |