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

The women's 100 metre breaststroke competition of the swimming events at the 2011 Pan American Games took place on October 17, at the Scotiabank Aquatics Center in the municipality of Zapopan, near Guadalajara, Mexico. The defending Pan American Games champion was Michelle McKeehan of the United States.
This race consisted of two lengths of the pool, both lengths being in breaststroke.

## Records

Prior to this competition, the existing world and Pan American Games records were as follows:
| World record | Jessica Hardy (USA) | 1:04.45 | Federal Way, United States | August 7, 2009 |
| Pan American Games record | Annamay Pierse (CAN) | 1:07.78 | Rio de Janeiro, Brazil | July 17, 2007 |

## Qualification

Each National Olympic Committee (NOC) was able to enter up to two entrants, providing they had met the A standard (1:13.3) 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 (1:15.5) in the same qualifying period.

## Results

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

### Heats

The first round was held on October 17.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 3 | 5 | Ashley McGregor | Canada | 1:09.24 | QA |
| 2 | 2 | 4 | Ashley Wanland | United States | 1:09.26 | QA |
| 3 | 2 | 5 | Alia Atkinson | Jamaica | 1:09.28 | QA |
| 4 | 3 | 4 | Annie Chandler | United States | 1:09.57 | QA |
| 5 | 1 | 4 | Kierra Smith | Canada | 1:10.15 | QA |
| 6 | 2 | 3 | Tatiane Sakemi | Brazil | 1:12.06 | QA |
| 7 | 3 | 3 | Arantxa Medina | Mexico | 1:12.79 | QA |
| 8 | 3 | 6 | Julia Sebastian | Argentina | 1:12.88 | QA |
| 9 | 1 | 7 | Trysha Centeno | Puerto Rico | 1:13.04 | QB |
| 10 | 3 | 2 | Daniela Victoria | Venezuela | 1:13.17 | QB |
| 11 | 1 | 6 | Mercedes Toledo | Venezuela | 1:13.20 | QB |
| 12 | 1 | 3 | Danielle Beaubrun | Saint Lucia | 1:13.29 | QB |
| 13 | 2 | 6 | Monica Alvarez | Colombia | 1:13.36 | QB |
| 14 | 1 | 5 | Carolina Mussi | Brazil | 1:13.75 | QB |
| 15 | 2 | 1 | Isabel Riquelme | Chile | 1:13.76 | QB |
| 16 | 3 | 1 | Lisa Blackburn | Bermuda | 1:14.33 | QB |
| 17 | 1 | 2 | Mijal Asis | Argentina | 1:14.71 | |
| 18 | 2 | 7 | Patricia Casellas | Puerto Rico | 1:15.56 | |
| 19 | 3 | 7 | Alicia Lightbourne | Bahamas | 1:15.66 | |
| 20 | 2 | 2 | McKayla Lightbourne | Bahamas | 1:15.95 | |

### B Final

The B final was also held on October 17.
| Rank | Lane | Name | Nationality | Time |
| 9 | 6 | Danielle Beaubrun | Saint Lucia | 1:10.63 |
| 10 | 2 | Monica Alvarez | Colombia | 1:12.25 |
| 11 | 5 | Daniela Victoria | Venezuela | 1:12.31 |
| 12 | 3 | Mercedes Toledo | Venezuela | 1:12.54 |
| 13 | 4 | Trysha Centeno | Puerto Rico | 1:12.87 |
| 14 | 1 | Isabel Riquelme | Chile | 1:13.99 |
| 15 | 8 | Lisa Blackburn | Bermuda | 1:14.75 |
| 16 | 7 | Carolina Mussi | Brazil | 1:15.63 |

### A Final

The A final was also held on October 17.
| Rank | Lane | Name | Nationality | Time |
| | 6 | Annie Chandler | United States | 1:07.90 |
| | 5 | Ashley Wanland | United States | 1:08.55 |
| | 4 | Ashley McGregor | Canada | 1:08.96 |
| 4 | 3 | Alia Atkinson | Jamaica | 1:09.11 |
| 5 | 2 | Kierra Smith | Canada | 1:10.23 |
| 6 | 7 | Tatiane Sakemi | Brazil | 1:11.46 |
| 7 | 1 | Arantxa Medina | Mexico | 1:12.29 |
| 8 | 8 | Julia Sebastian | Argentina | 1:12.60 |