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Women, 400 m Hurdles
All records considered statistically valid, but some of them, were unratified for various reasons.
   - Record was ratified           *   - Record was repeated             - Then World Record
 
  59.08 Wendy Koenig USA Phoenix May 24, 1973
58.98 Debbie Esser USA Westwood Jun 11, 1976  
57.24 Arthurine Gainer USA Westwood Jun 11, 1976  
57.07 Debbie Esser USA Westwood May 21, 1977  
56.61 Mary Ayers USA Westwood Jun 11, 1977  
56.40 Sandy Myers USA Eugene May 24, 1980  
56.16 Esther Mahr USA Sittard Aug 15, 1980  
55.78 Sharieffa Barksdale USA Knoxville May 21, 1983  
55.69 Lori McCauley USA Colorado Springs Jul 02, 1983  
54.99 Judi Brown USA San Jose Jun 09, 1984  
54.93 Judi Brown USA Los Angeles Jun 22, 1984  
54.66 Latanya Sheffield USA Austin May 31, 1985  
54.66* Judi Brown-King USA Brussels Aug 30, 1985  
54.38 Judi Brown-King USA Rome Sep 07, 1985  
54.23 Judi Brown-King USA Indianapolis Aug 16, 1987  
53.75 Sandra Farmer-Patrick USA Houston Jun 17, 1989  
53.37 Sandra Farmer-Patrick USA New York Jul 22, 1989  
52.79 Sandra Farmer-Patrick USA Stuttgart Aug 19, 1993  
52.61 Kim Batten USA Göteborg Aug 10, 1995
52.47 Lashinda Demus USA Daegu Sep 01, 2011  
52.20 Dalilah Muhammad USA Des Moines, IA Jul 28, 2019
52.16 Dalilah Muhammad USA Doha Oct 04, 2019
51.90 Sydney McLaughlin USA Eugene, OR Jun 27, 2021
51.46 Sydney McLaughlin USA Tokyo Aug 04, 2021
51.41 Sydney McLaughlin USA Eugene, OR Jun 25, 2022
50.68 Sydney McLaughlin USA Eugene, OR Jul 22, 2022
  50.65 Sydney McLaughlin USA Eugene, OR Jun 30, 2024