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USA Swimming Zone Teams
| Time | Date | Name | Team | Meet |
|---|---|---|---|---|
| 48.83 | Dec. 9, 2023 | Lily King | Mount Pleasant Aqua Club | Speedo Winter Junior Championship East |
| 49.43 | Dec. 14, 2013 | Heidi Miller | Greater Pittsburgh Aquatic Club | Speedo Winter Junior National Championships |
| 49.76 | March 24, 2013 | Heidi Miller | Fox Chapel Killer Whales | Speedo Champions Series - Christiansburg, VA |
| 49.99 | Dec. 8, 2012 | Heidi Miller | Fox Chapel Killer Whales | Speedo Winter Junior National Championships |
| 50.62 | Nov. 17, 2012 | Heidi Miller | Fox Chapel Killer Whales | LE The Mark J. Braun Fall Classic |
| 51.24 | Nov. 19, 2011 | Heidi Miller | JCC Sailfish (Jewish Community Ctr) | Mark J. Braun Fall Classic |
| 51.48 | March 29, 2009 | Lindsay Vrooman | Pine Richland Aquatics | PV Speedo Champions Serie |
| 51.84 | March 18, 2009 | Maggie Walker | Allegheny Mountain Swimming Zone | NCSA Junior National Swimming Championships |
| 52.47 | April 3, 2007 | Kelsey Grushecky | Laurel Highlands Regional YMCA | YMCA Short Course National Championships |
| 53.10 | April 6, 2006 | Kelsey Grushecky | Laurel Highlands Regional YMCA | YMCA Short Course National Championships |
| 53.12 | April 5, 2005 | Kelsey Grushecky | Laurel Highlands Regional YMCA | YMCA Nationals Short Course Championships |
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