2003 World Championships in Athletics – Women's 400 metres

These are the official results of the Women's 400 metres event at the 2003 IAAF World Championships in Paris, France. There were a total number of 37 participating athletes, with five qualifying heats, three semi-finals and the final held on Wednesday 27 August 2003 at 21:50h.

Semi-final

 * Held on Monday 25 August 2003

Heats
Held on Sunday 24 August 2003