Fastest swim long course 50 metres breaststroke (female)

According to Official Guinness Records,

The fastest long course swim in 50 metres breaststroke by a woman is 29.40 seconds by Lilly King (USA) at the 2017 FINA World Championships in Budapest, Hungary, on 30 July 2017. King set new world records on her way to gold in both the 50 m and 100 m breaststroke events at the championships.

For a complete list of 2017 records, please visit 2017 Guinness Records in Hungary.

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