The Royal Spanish Swimming Federation (Spanish: 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.

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