1991 World Championships in Athletics – Women's 400 metres

These are the official results of the Women's 400 metres event at the 1991 IAAF World Championships in Tokyo, Japan. There were a total of 37 participating athletes, with five qualifying heats and the final held on Tuesday 27 August 1991.

Schedule

 * All times are Japan Standard Time (UTC+9)

Semifinals

 * Held on Monday 1991-08-26

Quarterfinals

 * Held on Sunday 1991-08-25

Qualifying heats

 * Held on Saturday 1991-08-24