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 | 1:04.45 | Federal Way, United States | August 7, 2009 | |
| Pan American Games record | 1:07.78 | Rio de Janeiro, Brazil | July 17, 2007 |
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 | 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 | 1:09.24 | QA | |
| 2 | 2 | 4 | Ashley Wanland | 1:09.26 | QA | |
| 3 | 2 | 5 | Alia Atkinson | 1:09.28 | QA | |
| 4 | 3 | 4 | Annie Chandler | 1:09.57 | QA | |
| 5 | 1 | 4 | Kierra Smith | 1:10.15 | QA | |
| 6 | 2 | 3 | Tatiane Sakemi | 1:12.06 | QA | |
| 7 | 3 | 3 | Arantxa Medina | 1:12.79 | QA | |
| 8 | 3 | 6 | Julia Sebastian | 1:12.88 | QA | |
| 9 | 1 | 7 | Trysha Centeno | 1:13.04 | QB | |
| 10 | 3 | 2 | Daniela Victoria | 1:13.17 | QB | |
| 11 | 1 | 6 | Mercedes Toledo | 1:13.20 | QB | |
| 12 | 1 | 3 | Danielle Beaubrun | 1:13.29 | QB | |
| 13 | 2 | 6 | Monica Alvarez | 1:13.36 | QB | |
| 14 | 1 | 5 | Carolina Mussi | 1:13.75 | QB | |
| 15 | 2 | 1 | Isabel Riquelme | 1:13.76 | QB | |
| 16 | 3 | 1 | Lisa Blackburn | 1:14.33 | QB | |
| 17 | 1 | 2 | Mijal Asis | 1:14.71 | ||
| 18 | 2 | 7 | Patricia Casellas | 1:15.56 | ||
| 19 | 3 | 7 | Alicia Lightbourne | 1:15.66 | ||
| 20 | 2 | 2 | McKayla Lightbourne | 1:15.95 |
B Final
The B final was also held on October 17.| Rank | Lane | Name | Nationality | Time | Notes |
| 9 | 6 | Danielle Beaubrun | 1:10.63 | ||
| 10 | 2 | Monica Alvarez | 1:12.25 | ||
| 11 | 5 | Daniela Victoria | 1:12.31 | ||
| 12 | 3 | Mercedes Toledo | 1:12.54 | ||
| 13 | 4 | Trysha Centeno | 1:12.87 | ||
| 14 | 1 | Isabel Riquelme | 1:13.99 | ||
| 15 | 8 | Lisa Blackburn | 1:14.75 | ||
| 16 | 7 | Carolina Mussi | 1:15.63 |
A Final
The A final was also held on October 17.| Rank | Lane | Name | Nationality | Time | Notes |
| 6 | Annie Chandler | 1:07.90 | |||
| 5 | Ashley Wanland | 1:08.55 | |||
| 4 | Ashley McGregor | 1:08.96 | |||
| 4 | 3 | Alia Atkinson | 1:09.11 | ||
| 5 | 2 | Kierra Smith | 1:10.23 | ||
| 6 | 7 | Tatiane Sakemi | 1:11.46 | ||
| 7 | 1 | Arantxa Medina | 1:12.29 | ||
| 8 | 8 | Julia Sebastian | 1:12.60 |