Swimming at the 1955 Pan American Games – Men's 4 × 100 metre medley relay
The men's 4 × 100 metre medley relay competition of the swimming events at the 1955 Pan American Games took place on 21 March. It was the first appearance of this event in the Pan American Games.
Results
All times are in minutes and seconds.| KEY: | q | Fastest non-qualifiers | Q | Qualified | GR | Games record | NR | National record | PB | Personal best | SB | Seasonal best |
Heats
Final
The final was held on March 21.| Rank | Name | Nationality | Time | Notes |
| Frank McKinney Fred Maguire Leonide Baarcke Clark Scholes | 4:29.1 | |||
| Pedro Galvão Héctor Domínguez Orlando Cossani Federico Zwanck | 4:33.4 | |||
| Clemente Mejía Walter Ocampo Eulalio Ríos Otilio Holguin | 4:35.5 | |||
| 4 | João Gonçalves Filho Nélson Ferreira Fernando Pavão Manuel dos Santos | 4:38.2 | ||
| 5 | Jorge Flores Julio Martinez Jorge Attila Fernando Zameral | 5:18.2 | ||
| 6 | - - - - | - | - | |
| 7 | - - - - | - | - | |
| 8 | - - - - | - | - |