2001 World Championships in Athletics – Women's 400 metres

These are the official results of the Women's 400 metres event at the 2001 IAAF World Championships in Edmonton, Canada.

Heats
Qualification: First 3 in each semifinal (Q) and the next 6 fastest (q) advance to the semifinals.

Semifinals
Qualification: First 2 in each semifinal (Q) and the next 2 fastest (q) advance to the final.