The Water polo tournament was contested for men only at the 1963 Pan American Games in São Paulo, Brazil. The top three teams from the event qualified through to the 1964 Summer Olympics in Tokyo, Japan.
Five teams contested the event.[1]
Teams play in a round-robin format with the teams taking on each other twice. The team with the most points after eight matches would take the gold medal.
| Men's water polo | [2] Adhemar Grijó Filho Aladar Szabo Flávio Ratto Ivo Carotini João Gonçalves Filho Luiz Valim Luiz Daniel Luiz Eduardo Lima Márvio dos Santos Paulo Carotini | Charles Bittick Gordon Hall Kenneth Bathgate Kent Taylor Leslie Willeford Martin Hull Ned Melroy Ronald Severa Ronald Crawford Ronald Volmer |
----------------------------------------------------------------------------