| Final | time | ||
| 1. Ralph Mann |  United States | 49.10s | |
| 2. Jim Seymour | United States | 50.36s | |
| 3. Jose Jacinto Hidalgo |  Venezuela | 51.68s | |
| 4. Miguel Olivera |  Cuba | 52.05s | |
| 5. Juan Dyrzka |  Argentina | 52.13s | |
| 6. Orominio Santaella |  Puerto Rico | 53.50s | |
| 7. Francisco Dumeng | Puerto Rico | 53.54s | |
| 8. Manuel Ruiz |  Mexico | 56.24s |
| Todor66 | |
| Pan America Games 1971 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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