| Final | time | ||
| 1. Joshua Culbreath |  United States | 51.5s | |
| 2. Jaime Aparicio |  Colombia | 51.8s | |
| 3. Wilson Carneiro |  Brazil | 53.0s | |
| 4. Amadeo Francis |  Puerto Rico | 53.9s | |
| 5. Juan Leiva |  Venezuela | 54.7s | |
| 6. Oscar Fernändez |  Mexico | 55.1s |
| Todor66 | |
| Pan America Games 1955 index | |
| Pan America Games Athletics index | |
| World Athletics index | |
| . |
Prepared and maintained by Todor Krastev
todor1966@yahoo.com
Last updated: 30 Oct 2023
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