These are the official results of the Women's 400 metres event at the 1987 IAAF World Championships in

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, Italy. There were a total number of 41 participating athletes, with six qualifying heats and the final held on 31 August 1987.

Results

Final

Monday, 31 August 1987

Semifinals

Sunday, 30 August 1987

Heats

Saturday, 29 August 1987

References

Results
{{DEFAULTSORT:1987 World Championships in Athletics - Women's 400 Metres 400 metres at the World Athletics Championships 1987 in women's athletics