| Final | time | | 1. Rafael Fortún Chacon |  Cuba | 10.6s | | 2. Arthur Bragg |  United States | 10.6s | | 3. Herb McKenley |  Jamaica | 11.0s | | 4. Helio Coutinho da Silva |  Brazil | 11.0s | | 5. Fernando Salinas Acuna |  Chile | 11.1s | | 6. Gerardo Salazar |  Peru | 11.1s |
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| Semi 1 | time | | 1. Arthur Bragg | United States | 10.9s | | 2. Helio Coutinho da Silva | Brazil | 11.1s | | 3. Gerardo Bonnhoff |  Argentina | 11.3s | | 4. Hendrickson Harewood |  Trinidad Tobago | 11.4s | | 5. Adelio Márquez | Argentina | | | -. Hamilton Bridgeman | Trinidad Tobago | DSQ |
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| Semi 2 | time | | 1. Fernando Salinas Acuna | Chile | 10.9s | | 2. Herb McKenley | Jamaica | 10.9s | | 3. Andrés Fernandez Salvador |  Ecuador | 11.0s | | 4. Jesus Farrés O'Farril | Cuba | 11.1s | | 5. Don Campbell | United States | | | 6. José Telles da Conceicao | Brazil | |
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| Semi 3 | time | | 1. Rafael Fortún Chacon | Cuba | 11.0s | | 2. Gerardo Salazar | Peru | 11.1s | | 3. Raul Mazorra Zamorra | Cuba | 11.1s | | 4. Aristipo Lerma |  Colombia | 11.2s | | 5. Enrique Beckles | Argentina | | | -. José Zelaya del Pilar |  Paraguay | DSQ |
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| Heat 1 | time | | 1. Gerardo Bonnhoff | Argentina | 11.1s | | 2. Helio Coutinho da Silva | Brazil | 11.1s | | 3. Hamilton Bridgeman | Trinidad Tobago | 11.2s | | 4. Miguel León Pizzarro | Peru | 11.4s | | 5. Miguel Paredes | Paraguay | |
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| Heat 2 | time | | 1. Arthur Bragg | United States | 10.8s | | 2. Adelio Márquez | Argentina | 11.1s | | 3. Hendrickson Harewood | Trinidad Tobago | 11.2s | | 4. Juan Leiva |  Venezuela | 11.3s | | 5. Alfaro Parra | Colombia | |
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| Heat 3 | time | | 1. Jesús Farrés O'Farril | Cuba | 11.0s | | 2. Fernando Salinas Acuna | Chile | 11.1s | | 3. Andrés Fernandez Salvador | Ecuador | 11.3s | | 4. Oscar Maldonado | Peru | 11.3s | | 5. Alfredo Rodas | Paraguay | |
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| Heat 4 | time | | 1. Don Campbell | United States | 11.0s | | 2. Herb McKenley | Jamaica | 11.0s | | 3. José Telles da Conceicao | Brazil | 11.3s | | 4. Leonel Contreras | Chile | 11.5s | | 5. Javier Sousa Diaz |  Mexico | |
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| Heat 5 | time | | 1. José Zelaya del Pilar | Paraguay | 11.2s | | 2. Gerardo Salazar | Peru | 11.2s | | 3. Raúl Mazorra Zamorra | Cuba | 11.4s | | 4. Rodolfo López Neira | Chile | | | 5. Gustavo Fajardo | Colombia | |
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| Heat 6 | time | | 1. Rafael Fortún Chacon | Cuba | 11.1s | | 2. Aristipo Lerma | Colombia | 11.1s | | 3. Enrique Beckles | Argentina | 11.3s | | 4. Antonio Moreira | Brazil | | | 5. Germán Garrido | Venezuela | |
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