| Event: | Women's 400 metres |
| Games: | 2011 |
| Venue: | Telmex Athletics Stadium |
| Dates: | October 25 – October 26 |
| Competitors: | 14 |
| Nations: | 10 |
| Win Label: | Winning score |
| Gold: | Jennifer Padilla |
| Goldnoc: | COL |
| Silver: | Daisurami Bonne |
| Silvernoc: | CUB |
| Bronze: | Geisa Coutinho |
| Bronzenoc: | BRA |
| Prev: | 2007 |
| Next: | 2015 |
The women's 400 metres sprint competition of the athletics events at the 2011 Pan American Games will take place between the 24 and 26 of October at the Telmex Athletics Stadium.[1] The defending Pan American Games champion is Ana Guevara of Mexico, who has since retired.
Prior to this competition, the existing world and Pan American Games records were as follows:
| World record | 47.60 | 6 October 1985 | |||
| Pan American Games record | 49.61 | Havana, Cuba | August 5, 1991 |
Each National Olympic Committee (NOC) was able to enter up to two entrants providing they had met the minimum standard (53.00) in the qualifying period (January 1, 2010 to September 14, 2011).[2]
| Date | Time | Round | |
|---|---|---|---|
| October 25, 2011 | 16:15 | Semifinals | |
| October 26, 2011 | 17:40 | Final |
All times shown are in seconds.
The semifinals were held on October 25. The top three in each heat (Q) and the next two fastest (q) qualified for the final.[3] [4]
| Rank | Heat | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 2 | 51.76 | Q | |||
| 2 | 2 | 52.20 | Q | |||
| 3 | 2 | 52.47 | Q | |||
| 4 | 2 | 52.56 | q | |||
| 5 | 1 | 52.67 | Q | |||
| 6 | 1 | 52.76 | Q | |||
| 7 | 1 | 52.96 | Q | |||
| 8 | 1 | 53.08 | q | |||
| 9 | 1 | 53.29 | ||||
| 10 | 1 | 53.34 | ||||
| 11 | 1 | 53.38 | ||||
| 12 | 2 | 53.42 | SB | |||
| 13 | 2 | 54.38 | ||||
| 14 | 2 | 56.43 |
The final was held on October 26.
| Rank | Name | Nationality | Time[5] | Notes | |
|---|---|---|---|---|---|
| 51.53 | |||||
| 51.69 | |||||
| 51.87 | |||||
| 4 | 52.09 | ||||
| 5 | 52.18 | ||||
| 6 | 52.34 | ||||
| 7 | 52.69 | ||||
| 8 | 52.86 |