Guillermo Marro

Guillermo Osvaldo Marro (born 1 July 1983) is an Argentine Paralympic swimmer who competes in international elite events. He specialises in backstroke swimming. He is a triple Paralympic medalist, double World medalist and a triple Parapan American Games champion. He is highly regarded as Argentina's most successful Paralympic swimmer.

In 2014, Marro became the first Argentine Paralympic swimmer to cross the English Channel, he completed the swimming course in over fourteen hours. He swam as part of a team with Scott Patterson and Pedro Rangel who were double leg amputees, Moises Fuentes who is a paraplegic and Enrique Guerrero who has a below the knee amputation.