| Event: | Women's 4 x 100 metres relay |
| Games: | 2011 |
| Venue: | Telmex Athletics Stadium |
| Dates: | October 28 |
| Competitors: | 32 |
| Nations: | 8 |
| Win Label: | Winning time |
| Gold: | Ana Cláudia Silva, Vanda Gomes, Franciela Krasucki, Rosângela Santos |
| Goldnoc: | BRA |
| Silver: | Kenyanna Wilson, Barbara Pierre, Yvette Lewis, Chastity Riggien |
| Silvernoc: | USA |
| Bronze: | Lina Flórez, Jennifer Padilla, Yomara Hinestroza, Norma González |
| Bronzenoc: | COL |
| Prev: | 2007 |
| Next: | 2015 |
The women's 4 x 100 metres relay competition of the athletics events at the 2011 Pan American Games took place on the 28th October at the Telmex Athletics Stadium.[1] The defending Pan American Games champion were Sheri-Ann Brooks, Tracy-Ann Rowe, Aleen Bailey and Peta-Gaye Gayle of Jamaica.
Prior to this competition, the existing world and Pan American Games records were as follows:
| World record | 41.37 | Canberra, Australia | October 6, 1985 | ||
| Pan American Games record | 42.62 | Winnipeg, Canada | July 30, 1999 |
Each National Olympic Committee (NOC) was able to enter one team.[2]
All times shown are in seconds.
| KEY: | bgcolor=ccffcc align=center | q | Fastest non-qualifiers | bgcolor=ccffcc align=center | Q | Qualified | NR | National record | PB | Personal best | SB | Seasonal best | DQ | Disqualified |
Held on October 28.
| Rank | Nation | Athletes | Time[3] | Notes | |
|---|---|---|---|---|---|
| 42.85 | NR | ||||
| 43.10 | |||||
| 43.44 | SB | ||||
| 4 | 43.97 | SB | |||
| 5 | 44.33 | SB | |||
| 6 | 46.18 | NR | |||
| DNF | |||||
| DNF |