The Women's 100 metre backstroke competition of the 2024 European Aquatics Championships was held on 21 and 22 June 2024.

[1][2] Prior to the competition, the existing world, European and championship records were as follows.

The heats were started on 21 June at 09:51.Qualification Rules: The 16 fastest from the heats qualify to the semifinals.

[3] The semifinal were started on 21 June at 18:50.Qualification Rules: The first 2 competitors of each semifinal and the remaining fastest (up to a total of 8 qualified competitors) from the semifinals advance to the final.

[4] The final was held on 22 June at 20:07.