The women's 100 metre freestyle competition of the 2018 FINA World Swimming Championships (25 m) was held on 12 and 13 December 2018.

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

The heats were started on 12 December at 10:03.

[3] The semifinals were held on 12 December at 20:07.

[4] The final took place on 13 December at 19:09.