Swimming at the 2011 Pan American Games – Women's 100 metre freestyle
The Women's 100 metre freestyle swimming event at the 2011 Pan American Games was held on October 19, 2011 in Guadalajara, Mexico. The defending Pan American Games champion was Arlene Semeco of Venezuela.
This race consisted of two lengths of the pool, both in freestyle.
Records
Prior to this competition, the existing world and Pan American Games records were as follows:| World Record | 52.07 | Rome, Italy | July 31, 2009 | |
| Games Record | 54.46 | Santo Domingo, Dominican Republic | August 11, 2003 |
Qualification
Each National Olympic Committee was able to enter up to two entrants providing they had met the A standard in the qualifying period. NOCs were also permitted to enter one athlete providing they had met the B standard 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 19.| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 1 | 4 | Amanda Kendall | 54.82 | QA | |
| 2 | 2 | 4 | Vanessa Garcia | 55.73 | QA | |
| 3 | 3 | 5 | Erika Erndl | 55.98 | QA | |
| 4 | 2 | 5 | Jennifer Beckberger | 56.15 | QA | |
| 5 | 3 | 4 | Tatiana Barbosa | 56.47 | QA | |
| 6 | 2 | 6 | Nadia Colovini | 56.66 | QA | |
| 7 | 3 | 3 | Arlene Semeco | 56.69 | QA | |
| 8 | 1 | 3 | Liliana Ibañez | 56.83 | QA | |
| 9 | 1 | 5 | Daynara de Paula | 57.14 | QB | |
| 10 | 2 | 3 | Caroline Lapierre | 57.43 | QB | |
| 11 | 1 | 2 | Ariel Weech | 57.97 | QB | |
| 12 | 1 | 6 | Wendy Rodriguez | 58.14 | QB | |
| 13 | 2 | 2 | Karen Torrez | 58.81 | QB | |
| 14 | 3 | 6 | Chinyere Pigot | 58.95 | QB | |
| 15 | 1 | 7 | Allyson Ponson | 59.59 | QB | |
| 16 | 3 | 7 | Karen Riveros | 1:00.11 | QB | |
| 17 | 3 | 1 | Julimar Avila | 1:00.15 | ||
| 18 | 2 | 1 | Marie Meza Peraza | 1:01.13 | ||
| 19 | 1 | 1 | Britany van Lange | 1:02.28 | ||
| 3 | 2 | Fernanda González | DNS | |||
| 2 | 7 | Kendese Nangle | DNS |
B Final
The B final was also held on October 19.| Rank | Lane | Name | Nationality | Time | Notes |
| 9 | 5 | Ariel Weech | 57.58 | ||
| 10 | 4 | Caroline Lapierre | 57.70 | ||
| 11 | 3 | Wendy Rodriguez | 58.03 | ||
| 12 | 6 | Karen Torrez | 58.84 | ||
| 13 | 2 | Chinyere Pigot | 59.03 | ||
| 14 | 7 | Allyson Ponson | 59.16 | ||
| 15 | 1 | Karen Riveros | 59.96 | ||
| 16 | 8 | Julimar Avila | 1:00.51 |
A Final
The A final was also held on October 19.| Place | Lane | Swimmer | Nation | Time | Notes |
| 4 | Amanda Kendall | 54.75 | |||
| 3 | Erika Erndl | 55.04 | |||
| 1 | Arlene Semeco | 55.43 | |||
| 4 | 5 | Vanessa García | 55.55 | ||
| 5 | 6 | Jennifer Beckberger | 55.68 | ||
| 6 | 8 | Liliana Ibañez | 55.74 | NR | |
| 7 | 2 | Tatiana Barbosa | 56.36 | ||
| 8 | 7 | Nadia Colovini | 56.53 |