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| Time | Date | Name | Team | Meet |
|---|---|---|---|---|
| 48.79 | March 23, 2024 | Kaley McIntyre | New York University | NCAA Division III Championship |
| 48.98 | March 20, 2010 | Kendra Stern | Amherst College | NCAA Division III Championships |
| 49.37 | March 21, 2009 | Kendra Stern | Amherst College | NCAA Division III Championships |
| 49.63 | March 15, 2008 | Kendra Stern | Amherst College | NCAA Division III Womens Championship |
| 50.84 | March 10, 2007 | Michelle Coombs | State University of New York at New Paltz | NCAA Division III Womens Championships |
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