| Final 05.08 | time | |
1. | Cuba | 44.63s | | |
4Marcia Garbey Montell, Cristina Echevarria Hechevarria, Violeta Quesada Diaz, Miguelina Cobian Hechevaria |
2. | Canada | 45.56s | | |
4Jugith Dallimore, Arleen McLaughlin, Janet Maddin, Irene Piotrowski |
3. | Jamaica | 47.17s | | |
4Carol Cummings, Una Morris, Audrey Reid, Vilma Charlton |
-. | United States | 45.00s | DQ | |
4Janet McFarlane, Jane Burnett, Dee Debusk, Barbara Ferrell |
-. | Mexico | 48.54s | DQ | |
4Enriqueta Basilio Sotelo, Gladys Azcuaga Silva, Mercedes Roman Casillas, Esperanza Giron Olivares |