| Final 07.07 |
| | 1. United States | 3:45.82 | | Stephanie Elkins 57.90s, Tracy Caulkins 1:54.11, Jill Sterkel 2:50.35, Cynthia Woodhead | | 2. Canada | 3:50.18 | | Gail Amundrud 57.89s, Carol Klimpel 1:55.20, Ann Jardin 2:52.41, Wendy Quirk | | 3. Mexico | 4:02.05 | | Teresa Rivera 1:00.68, Isabel Reuss 2:01.59, Yvonne Guerrero 3:02.25, Helen Plachinski | | 4. Puerto Rico | 4:07.55 | | Sonia Acosta 1:00.67, Vilma Aguilera 1:59.93, Genny Hernandez 3:03.29, Wanda Acosta | | 5. Brazil | 4:08.97 | | Maria Fatima 1:02.71, Maria Clara Matta 2:05.86, Adriana Pereira 3:06.76, Maria Guimaraes | | 6. Argentina | 4:10.99 | | Alicia Boscatto 1:05.41, Andrea Neumayer 2:08.00, Virginia Sanchero 3:09.33, Rosanna Juncos 4:10.9 |
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