Swimming at the 2025 World Aquatics Championships – Women's 50 metre backstroke

Each National Federation was permitted to enter a maximum of two qualified athletes in each individual event, but they could do so only if both of them had attained the "A" standard qualification time. For this event, the "A" standard qualification time was 24.86. Federations could enter one athlete into the event if they met the "B" standard qualification time. For this event, the "B" standard qualification time was 25.73. Athletes could also enter the event if they had met an "A" or "B" standard in a different event and their Federation had not entered anyone else. Additional considerations applied to Federations who had few swimmers enter through the standard qualification times. Federations in this category could at least enter two men and two women to the competition, all of whom could enter into up to two events. ==Records==