Marcos Prono

{{short description|Paraguayan swimmer}}

{{Use dmy dates|date=August 2020}}

{{Infobox swimmer

| name = Marcos Prono

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| fullname = Marcos Andrés Prono Toñánez

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| birth_date = {{birth date and age|1975|5|16|df=yes}}

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Marcos Prono (born 16 May 1975) is a Paraguayan former swimmer. He competed in the men's 100 metre backstroke and men's 200 metre backstroke events at the 1992 Summer Olympics held in Barcelona, Spain.{{cite Sports-Reference |url=https://www.sports-reference.com/olympics/athletes/pr/marcos-prono-1.html |title=Marcos Prono Olympic Results |accessdate=11 March 2020 |archiveurl=https://web.archive.org/web/20121218132340/http://www.sports-reference.com/olympics/athletes/pr/marcos-prono-1.html |archivedate=18 December 2012 |url-status=dead}}