Masters M55 400 metres world record progression
# Masters M55 400 metres world record progression

This is the progression of world record improvements of the 400 metres M55 division of Masters athletics.

## Key

Incomplete information  Pending

| Hand | Auto | Athlete | Nationality | Birthdate | Location | Date |
| - | - | - | - | - | - | - |
| | 52.24 | Charles Allie | United States | 20.08.1947 | Carolina | 12.07.2003 |
| | 52.52 | Ralph Romain | Trinidad and Tobago | 20.07.1932 | Alexandria | 22.07.1990 |
| | 53.81 | Berthold Neumann | Germany | 19.12.1930 | Radolfzell | 06.09.1986 |
| | 54.56 | Rudolph Valentine | United States | 12.07.1923 | Eagle Rock | 09.06.1979 |
| 55.9 | | Charles Beaudry | United States | 04.09.1918 | | 18.08.1974 |
