Athletics at the 1980 Summer Olympics – Women's 400 metres

These are the official results of the women's 400 metres event at the 1980 Summer Olympics in Moscow. The competition was held on July 25, 1980, and on July 28, 1980.

Final

 * Held on Monday July 28, 1980

Semifinals

 * Held on Sunday July 27, 1980

Heats

 * Held on Friday July 25, 1980