2018 FINA World Swimming Championships (25 m) – Women's 50 metre backstroke

The Women's 50 metre backstroke at the 2018 FINA World Swimming Championships (25 m) was a swimming event held as part of the short course championships. The event consisted of a single length (50 metres) of the pool in the backstroke style. Swimmers competed in heats, semi-finals (if applicable), and a final, with the fastest swimmers from each stage advancing. The event tested the competitors' speed, technique, and start and underwater abilities specific to the backstroke. The competition was governed by FINA (Fédération Internationale de Natation) rules and regulations. Results included the finishing times for each swimmer, determining the medalists (gold, silver, and bronze) and overall ranking in the event. The competition forms a part of the overall program of the 2018 FINA World Swimming Championships (25 m), showcasing the world's best short course swimmers.