2011 World Championships in Athletics – Women's 4 × 400 metres relay

The Women's 4 × 400 metres relay event at the 2011 World Championships in Athletics was held at the Daegu Stadium on 2 and 3 September.

The United States held the two fastest relay times before the championships and had won the 2007 and 2009 world titles, as well as the 2008 Olympic gold medals.

A Brazilian team had broken the South American record a month before the championships and was the third fastest qualifying nation.

In the final, the United States led off with previous world champion Sanya Richards-Ross, who handed off to silver medalist Allyson Felix in the lead.

Felix extended the lead with Russian Natalya Antyukh and then Jamaica 's Davita Prendergast chasing about 5 metres back.