| Assocname: | Royal Spanish Swimming Federation Real Federación Española de Natación |
| Logosize: | 175px |
| Sport: | Water polo, swimming, synchronized swimming, diving, open water swimming |
| Abbrev: | RFEN |
| Founded: | 1920 |
| Aff: | International Swimming Federation (FINA) European Swimming League (LEN) |
| Headquarters: | Madrid, Spain |
| Location: | M86 Swimming Center |
| President: | Fernando Carpena Pérez |
| Url: | http://www.rfen.es |
| Countryflag: | ESP |
The Royal Spanish Swimming Federation (es|Real Federación Española de Natación - RFEN) founded in 1920, is the aquatics national federation for Spain. It oversees competition in the 5 aquatics disciplines (swimming, diving, open water swimming, synchronized swimming and water polo) and Masters competition in these. As of 2023, the federation has 790 registered clubs and 66,766 federated swimmers.[1]
It is affiliated to: