Athletics at the 1951 Pan American Games – Men's marathon

{{Infobox Pan American Games event

|event = Men's marathon

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|win_label = Winning time

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{{Athletics at the 1951 Pan American Games}}

The men's marathon event at the 1951 Pan American Games was held at the Estadio Monumental in Buenos Aires on 6 March.[http://atfs.org/wp-content/uploads/Pan-Am-Games-1951-Updated-May2020.pdf Full results]{{cite web|url=http://trackfield.brinkster.net/Tournaments.asp?TourCode=P&Year=1951&Gender=M&TF=T&P=F|website=trackfield.brinkster.net|title=Track and Field Statistics |accessdate=12 November 2020}}