| Event: | Women's 4 × 400 metres relay |
| Games: | 1979 |
| Venue: | Estadio Sixto Escobar |
| Dates: | 14 July |
| Win Value: | 3:29.4 |
| Win Label: | Winning time |
| Gold: | Rosalyn Bryant, Sharon Dabney, Patricia Jackson, Essie Kelley |
| Goldnoc: | USA |
| Silver: | Ana Luisa Guibert, Nery McKeen, Aurelia Pentón, Ana Fidelia Quirot |
| Silvernoc: | CUB |
| Bronze: | Anne Mackie-Morelli, Marita Payne, Micheline Racette, Jeanette Wood |
| Bronzenoc: | CAN |
| Prev: | 1975 |
| Next: | 1983 |
The women's 4 × 400 metres relay competition of the athletics events at the 1979 Pan American Games took place on 14 July at the Estadio Sixto Escobar.[1] The defending Pan American Games champion was the Canadian team.
Prior to this competition, the existing world and Pan American Games records were as follows:
| World record | 3:19.23 | Montreal, Canada | July 31, 1976 | ||
| Pan American Games record | 3:30.36 | Mexico City, Mexico | 1975 |
All times shown are in minutes and seconds.[2]
| KEY: | WR | World Record | GR | Pan American Record |
| Rank | Nation | Competitors | Time | Notes | |
|---|---|---|---|---|---|
| Sharon Dabney, Patricia Jackson, Rosalyn Bryant, Essie Kelley | 3:29.4 | GR | |||
| Ana Fidelia Quirot, Nery McKeen, Ana Luisa Guibert, Aurelia Pentón | 3:36.3 | ||||
| Micheline Racette, Marita Payne, Jeanette Wood, Anne Mackie-Morelli | 3:37.6 | ||||
| 4 | Tânia Miranda, Margit Weise, Sueli Machado, Joyce dos Santos | 3:45.7 | |||
| 5 | Georgina López, Nilsa Paris, Ileana Hocking, Angelita Lind | 3:49.4 |