| Final | time | ||
| 1. George Kerr |  Jamaica | 46.1s | |
| 2. Basil Ince |  Trinidad Tobago | 46.4s | |
| 3. Malcolm Spence | Jamaica | 46.6s | |
| 4. Dave Mills |  United States | 46.7s | |
| 5. Ivan Rodriguez |  Puerto Rico | 47.0s | |
| 6. Jack Yerman | United States | 47.9s |
| Todor66 | |
| Pan America Games 1959 index | |
| Pan America Games Athletics index | |
| World Athletics index | |
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Last updated: 30 Oct 2023
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