Masters W45 400 metres world record progression
# Masters W45 400 metres world record progression

This is the progression of world record improvements of the 400 metres W45 division of Masters athletics.

## Key

Incomplete information  Pending

| Hand | Auto | Athlete | Nationality | Birthdate | Location | Date |
| - | - | - | - | - | - | - |
| | 56.14 | Angee Henry-Nott | United States | 21 December 1975 | Ames: Video on YouTube | 23 July 2021 |
| | 56.15 | Marie Lande Mathieu | Puerto Rico | 26 November 1956 | Carolina | 12 July 2003 |
| | 56.82 | Mary Libal | United States | 28 June 1950 | Buffalo | 22 July 1995 |
| 57.8 | | Jan Hynes | Australia | 3 April 1944 | Brisbane | 1 March 1989 |
| | 59.68 | Colleen Mills | New Zealand | 23 November 1933 | Christchurch | 10 January 1981 |
