Athletics at the 1984 Summer Olympics – Women's 400 metres hurdles

The Women's 400 metres Hurdles at the 1984 Summer Olympics in Los Angeles, California (USA) had an entrylist of 26 competitors, with four qualifying heats (26 runners) and two semifinals (16) before the final (8) took place on August 8, 1984. The women's event was for the first time contested at the Olympic Games.