The women's 400 metres hurdles at the 2012 World Junior Championships in Athletics was held at the Estadi Olímpic Lluís Companys on 12, 13, and 14 July.
The women's 400 metres hurdles at the 2012 World Junior Championships in Athletics was held at the Estadi Olímpic Lluís Companys on 12, 13, and 14 July. (en)
A prova dos 400 metros com barreiras feminino do Campeonato Mundial Júnior de Atletismo de 2012 ocorreu entre os dias 12 e 14 de julho em Barcelona, na Espanha. (pt)