Swimming at the 2011 World Aquatics Championships – Women's 100 metre backstroke
The women's 100 metre backstroke competition of the swimming events at the 2011 World Aquatics Championships were held on July 25 with the preliminary round and the semifinals and July 26 with the final. Records. Prior to the competition, the existing world and championship records were as follows. Results. Heats. 53 swimmers participated in 7 heats, qualified swimmers are listed: Semifinals. The semifinals were held at 18:46. Final. The final was held at 18:11. Swimming at the 2011 World Aquatics Championships – Women's 100 metre backstroke The