# Swimming at the 2011 Pan American Games – Women's 100 metre backstroke

The women's 100 metre backstroke competition of the swimming events at the 2011 Pan American Games took place on October 16 at the Scotiabank Aquatics Center in the municipality of Zapopan, near Guadalajara, Mexico. The defending Pan American Games champion is Julia Smit of the United States.
This race consisted of two lengths of the pool, both lengths being in the backstroke.

## Records

Prior to this competition, the existing world and Pan American Games records were as follows:
| World record | Gemma Spofforth (GBR) | 58.12 | Rome, Italy | July 28, 2009 |
| Pan American Games record | Barbara Bedford (USA) | 1:01.71 | Mar del Plata, Argentina | March 14, 1995 |

## Qualification

Each National Olympic Committee (NOC) was able to enter up to two entrants providing they had met the A standard (1:03.7) 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 (1:05.6) 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 16.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 2 | 4 | Elizabeth Pelton | United States | 1:01.57 | GR, QA |
| 2 | 3 | 4 | Rachel Bootsma | United States | 1:01.75 | QA |
| 3 | 3 | 5 | Maria Fernanda Gonzalez | Mexico | 1:01.84 | QA |
| 4 | 1 | 4 | Fabiola Molina | Brazil | 1:02.81 | QA |
| 5 | 3 | 3 | Gisela Maria Morales | Guatemala | 1:02.95 | QA |
| 6 | 2 | 5 | Gabrielle Soucisse | Canada | 1:03.04 | QA |
| 7 | 3 | 6 | Carolina Colorado Henao | Colombia | 1:03.22 | QA |
| 8 | 2 | 6 | Isabella Arcila | Colombia | 1:04.30 | QA |
| 9 | 1 | 6 | Cecilia Bertoncello | Argentina | 1:04.53 | QB |
| 10 | 1 | 5 | Etiene Medeiros | Brazil | 1:04.59 | QB |
| 11 | 3 | 2 | Florencia Perotti | Argentina | 1:04.94 | QB |
| 12 | 3 | 7 | Samantha Corea | Canada | 1:05.01 | QB |
| 13 | 1 | 2 | Jeserik Pinto | Venezuela | 1:05.27 | QB |
| 14 | 2 | 3 | Alana Dillette | Bahamas | 1:05.34 | QB |
| 15 | 2 | 7 | Estela Davis | Mexico | 1:05.50 | QB |
| 16 | 1 | 3 | Kiera Aitken | Bermuda | 1:05.63 | QB |
| 17 | 2 | 2 | Alana Berrocal | Puerto Rico | 1:06.09 | |
| 18 | 2 | 1 | Karen Vilorio | Honduras | 1:07.06 | |
| 19 | 1 | 7 | Kendese Nangle | Jamaica | 1:07.47 | |
| 20 | 3 | 1 | Ines Remersaro | Uruguay | 1:07.61 | |
| 21 | 1 | 1 | Laura Rodríguez | Dominican Republic | 1:09.51 | |

### B Final

The B final was also held on October 16.
| Rank | Lane | Name | Nationality | Time |
| 9 | 4 | Cecilia Bertoncello | Argentina | 1:03.26 |
| 10 | 6 | Samantha Corea | Canada | 1:04.03 |
| 11 | 3 | Florencia Perotti | Argentina | 1:04.78 |
| 12 | 7 | Alana Dillette | Bahamas | 1:04.85 |
| 12 | 5 | Etiene Medeiros | Brazil | 1:04.85 |
| 14 | 1 | Estela Davis | Mexico | 1:05.28 |
| 15 | 2 | Jeserik Pinto | Venezuela | 1:05.38 |
| 16 | 8 | Kiera Aitken | Bermuda | 1:06.12 |

### A Final

The A final was also held on October 16.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 5 | Rachel Bootsma | United States | 1:00.37 | GR |
| | 4 | Elizabeth Pelton | United States | 1:01.12 | |
| | 3 | Maria Fernanda Gonzalez | Mexico | 1:02.00 | |
| 4 | 6 | Fabiola Molina | Brazil | 1:02.04 | |
| 5 | 1 | Carolina Colorado Henao | Colombia | 1:02.83 | |
| 6 | 7 | Gabrielle Soucisse | Canada | 1:02.88 | |
| 7 | 2 | Gisela Maria Morales | Guatemala | 1:03.37 | |
| 8 | 8 | Isabella Arcila | Colombia | 1:03.80 | |