Women's 400 metres world record progression

The first world record in the 400 m for women (athletics) was recognized by the International Amateur Athletics Federation, now known as the International Association of Athletics Federations, in 1957. To June 21, 2009, the IAAF has ratified 27 world records in the event. Their 2009 record progression list, however, lists 26 records.

Women's 400 metres world record progression

The first world record in the 400 m for women (athletics) was recognized by the International Amateur Athletics Federation, now known as the International Association of Athletics Federations, in 1957. To June 21, 2009, the IAAF has ratified 27 world records in the event. Their 2009 record progression list, however, lists 26 records.