The girls' 400 metres at the 2011 World Youth Championships in Athletics was held at the Stadium Nord Lille Métropole on 6 and 8 July. Medalists Records Prior to the competition, the following records were as follows. No new records were set during the competition. Heats Qualification rule: first 3 of each heat (Q) plus the 6 fastest times (q) qualified. Heat 1 Heat 2 Heat 3 Heat 4 Heat 5 Heat 6 Semifinal Qualification rule: first 2 of each heat (Q) plus the 2 fastest times (q) qualified. Heat 1 Heat 2 Heat 3 Final References 2011 World Youth Championships in Athletics