Gerardo Rosario (born 14 August 1957) is a Filipino former swimmer who has competed in the Summer Olympic Games.

[1] Rosario was also a competitor in the Asian Games, first competing in the 1974 Asian Games in Tehran where he won two silvers in the 100-meter and 200-meter back stroke, and three bronzes in the 4x100-meter and 4x200-meter freestyle relays, and the 4x100-meter medley relay.

[2] He is also the gold medalist for the 200-meter men's freestyle event of the 1978 Asian Games.

[3] In April 2017, Rosario was designated as Officer in Charge or Acting President of PSI.

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