Swimming at the 2007 World Aquatics Championships – Women's 50 metre breaststroke

The Women's 50m Breaststroke at the 2007 World Aquatics Championships took place on 31 March (prelims & semifinals) and the evening of 1 April (finals) at the Rod Laver Arena in Melbourne, Australia. 86 swimmers were entered in the event, of which 74 swam.

Existing records at the start of the event were:
 * World Record (WR): 30.31, Jade Edmistone (Australia), 30 January 2006 in Melbourne, Australia.
 * Championship Record (CR): 30.45, Jade Edmistone (Australia), Montreal 2005 (31 July 2005)