| Event: | Women's 4 × 100 metres relay |
| Win Label: | Winning time |
The women's 4 × 100 metres relay at the 2007 Pan American Games was held on July 27–28.
| width=200 valign=top | Sheri-Ann Brooks Tracy-Ann Rowe Aleen Bailey Peta-Gaye Dowdie Nadine Palmer | width=200 valign=top | Shareese Woods Mechelle Lewis Alexis Weatherspoon Mikele Barber | width=200 valign=top | Virgen Benavides Roxana Díaz Misleidys Lazo Anay Tejeda Yenima Arencibia |
Qualification: First 3 teams of each heat (Q) plus the next 2 fastest (q) qualified for the final.
| Rank | Heat | Nation | Athletes | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 1 | 43.07 | Q | |||
| 2 | 1 | 43.46 | Q | |||
| 3 | 2 | 43.98 | Q | |||
| 4 | 1 | 44.05 | Q, NR | |||
| 5 | 2 | 44.11 | Q, NR | |||
| 6 | 2 | 44.12 | Q | |||
| 7 | 1 | 44.16 | q | |||
| 8 | 2 | 44.53 | q | |||
| 9 | 1 | 45.13 | ||||
| 10 | 2 | 45.50 | ||||
| 11 | 1 | 46.55 |
| Rank | Lane | Nation | Athletes | Time | Notes | |
|---|---|---|---|---|---|---|
| 7 | 43.58 | |||||
| 4 | 43.62 | |||||
| 3 | 43.80 | |||||
| 4 | 2 | 43.81 | NR | |||
| 5 | 6 | 44.14 | ||||
| 6 | 5 | 44.14 | ||||
| 7 | 8 | 44.33 | ||||
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