The women's 400 metres hurdles at the 2015 World Championships in Athletics was held at the Beijing National Stadium on 23, 24 and 26 August.

[1] Zuzana Hejnová of the Czech Republic entered the competition as the defending champion.

[2][3] Through these championships Cassandra Tate had been the #1 qualifier in the heats and #2 in the semi-finals, earning her a center lane position next to #1 qualifier, the defending champion Hejnová.

Hejnová just continued to build her lead unchallenged to the finish, as Little struggled over hurdle 8, stretching to 9 and again awkward at 10.

Sara Petersen made a late rush at Tate coming into the 10th hurdle, but Tate carried her momentum better into the finish to claim bronze.