2012 IAAF World Indoor Championships – Women's 400 metres

The women's 400 metres at the 2012 IAAF World Indoor Championships was held at the Ataköy Athletics Arena on 9 and 10 March.

Heats
Qualification: First 2 in each heat (Q) and the next 6 fastest (q) advance to the semifinals.

Semifinals
Qualification: First 2 of each heat qualified (Q).


 * † = Bimbo Miel Ayedou's sample later tested positive for banned substances and she was disqualified.