# Swimming at the 2011 Pan American Games – Women's 50 metre freestyle

The women's 50 metre freestyle competition of the swimming events at the 2011 Pan American Games took place on October 21 at the Scotiabank Aquatics Center in the municipality of Zapopan, near Guadalajara, Mexico. The defending Pan American Games champion is Arlene Semeco of Venezuela.
This race consisted of one length of the pool in freestyle.

## Records

Prior to this competition, the existing world and Pan American Games records were as follows:
| World record | Britta Steffen (GER) | 23.73 | Rome, Italy | August 2, 2009 |
| Pan American Games record | Arlene Semeco (VEN) | 25.14 | Rio de Janeiro, Brazil | July 18, 2007 |

## Qualification

Each National Olympic Committee (NOC) was able to enter up to two entrants providing they had met the A standard (26.4) in the qualifying period (January 1, 2010 to September 4, 2011). NOCs were also permitted to enter one athlete providing they had met the B standard (27.2) in the same qualifying period.

## Results

All times are in minutes and seconds.
| KEY: | q | Fastest non-qualifiers | Q | Qualified | GR | Games record | NR | National record | PB | Personal best | SB | Seasonal best |

### Heats

The first round was held on October 21.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 1 | 5 | Graciele Herrmann | Brazil | 25.28 | QA |
| 2 | 3 | 4 | Lara Jackson | United States | 25.39 | QA |
| 3 | 2 | 4 | Madison Kennedy | United States | 25.40 | QA |
| 4 | 3 | 5 | Arlene Semeco | Venezuela | 25.58 | QA |
| 5 | 1 | 4 | Vanessa García | Puerto Rico | 25.64 | QA |
| 6 | 2 | 5 | Flavia Delaroli-Cazziolato | Brazil | 25.77 | QA |
| 7 | 1 | 6 | Nadia Colovini | Argentina | 26.04 | QA, NR |
| 8 | 3 | 3 | Jennifer Beckberger | Canada | 26.05 | QA |
| 9 | 3 | 2 | Liliana Ibáñez | Mexico | 26.34 | QB |
| 10 | 3 | 6 | Carolina Colorado Henao | Colombia | 26.64 | QB |
| 11 | 2 | 3 | Caroline Lapierre | Canada | 26.66 | QB |
| 12 | 1 | 2 | Ariel Weech | Bahamas | 26.76 | QB |
| 13 | 2 | 6 | Ximena Vilar | Venezuela | 26.84 | QB |
| 14 | 1 | 3 | Chinyere Pigot | Suriname | 26.89 | QB |
| 15 | 3 | 7 | Allyson Ponson | Aruba | 27.16 | QB |
| 16 | 2 | 7 | Karen Torrez | Bolivia | 27.24 | QB |
| 17 | 1 | 7 | Kiera Aitken | Bermuda | 27.27 | |
| 18 | 2 | 2 | Debra Rodriguez | Puerto Rico | 27.28 | |
| 19 | 3 | 1 | Karin O'Reilly | Netherlands Antilles | 31.41 | |

### B Final

The B final was also held on October 21.
| Rank | Lane | Name | Nationality | Time |
| 9 | 4 | Liliana Ibáñez | Mexico | 26.17 |
| 10 | 6 | Ariel Weech | Bahamas | 26.49 |
| 11 | 3 | Caroline Lapierre | Canada | 26.53 |
| 12 | 5 | Carolina Colorado Henao | Colombia | 26.65 |
| 13 | 2 | Ximena Vilar | Venezuela | 26.80 |
| 14 | 1 | Allyson Ponson | Aruba | 26.93 |
| 15 | 8 | Karen Torrez | Bolivia | 27.03 |
| 16 | 7 | Chinyere Pigot | Suriname | 27.32 |

### A Final

The A final was also held on October 21.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 5 | Lara Jackson | United States | 25.09 | GR |
| | 4 | Graciele Herrmann | Brazil | 25.23 | |
| | 3 | Madison Kennedy | United States | 25.24 | |
| 4 | 2 | Vanessa García | Puerto Rico | 25.39 | |
| 5 | 6 | Arlene Semeco | Venezuela | 25.57 | |
| 6 | 7 | Flavia Delaroli-Cazziolato | Brazil | 25.94 | |
| 7 | 1 | Nadia Colovini | Argentina | 26.08 | |
| 8 | 8 | Jennifer Beckberger | Canada | 26.12 | |