| Event: | Womenen's 100 metre individual medley |
| Competition: | 2018 FINA World Swimming Championships (25 m) |
| Venue: | Hangzhou Sports Park Stadium |
| Dates: | 13 December (heats and semifinals) 14 December (final) |
| Competitors: | 39 |
| Nations: | 34 |
| Win Value: | 57.26 |
| Gold: | Katinka Hosszú |
| Goldnoc: | HUN |
| Silver: | Runa Imai |
| Silvernoc: | JPN |
| Bronze: | Alia Atkinson |
| Bronzenoc: | JAM |
| Prev: | 2016 |
| Next: | 2021 |
The women's 100 metre individual medley competition of the 2018 FINA World Swimming Championships (25 m) was held on 13 and 14 December 2018.[1]
Prior to the competition, the existing world and championship records were as follows.
| Name | Nation | Time | Location | Date | ||
|---|---|---|---|---|---|---|
| World record | Katinka Hosszú | 56.51 | Berlin | 7 August 2017 | ||
| Championship record | Katinka Hosszú | 56.70 | Doha | 5 December 2014 |
The heats were started on 13 December at 10:06.[2]
| Rank | Heat | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|---|
| 1 | 4 | 4 | Q | ||||
| 2 | 4 | 3 | Q | ||||
| 3 | 3 | 5 | Q | ||||
| 4 | 4 | 5 | Q | ||||
| 5 | 3 | 3 | Q | ||||
| 6 | 4 | 6 | Q | ||||
| 7 | 3 | 6 | Q | ||||
| 8 | 3 | 4 | Q | ||||
| 9 | 2 | 4 | Q | ||||
| 10 | 3 | 2 | Q | ||||
| 11 | 2 | 5 | Q | ||||
| 12 | 2 | 6 | Q | ||||
| 13 | 3 | 8 | 1:00.11 | Q | |||
| 14 | 3 | 7 | 1:00.71 | Q | |||
| 15 | 2 | 3 | 1:00.82 | Q | |||
| 16 | 2 | 2 | 1:01.24 | Q | |||
| 17 | 3 | 0 | 1:01.34 | ||||
| 18 | 4 | 2 | 1:01.47 | ||||
| 19 | 2 | 7 | 1:01.49 | ||||
| 20 | 4 | 7 | 1:01.60 | ||||
| 21 | 4 | 1 | 1:01.66 | ||||
| 22 | 4 | 0 | 1:01.75 | ||||
| 23 | 3 | 1 | 1:01.79 | ||||
| 24 | 1 | 4 | 1:01.87 | ||||
| 25 | 2 | 8 | 1:01.93 | ||||
| 26 | 2 | 1 | 1:01.94 | ||||
| 27 | 3 | 9 | 1:02.07 | ||||
| 28 | 4 | 8 | 1:02.10 | ||||
| 29 | 2 | 9 | 1:02.77 | ||||
| 30 | 4 | 9 | 1:02.99 | ||||
| 31 | 2 | 0 | 1:03.16 | ||||
| 32 | 1 | 5 | 1:04.50 | ||||
| 33 | 1 | 3 | 1:05.04 | ||||
| 34 | 1 | 0 | 1:07.96 | ||||
| 35 | 1 | 8 | 1:08.53 | ||||
| 36 | 1 | 2 | 1:09.99 | ||||
| 37 | 1 | 6 | 1:13.51 | ||||
| 38 | 1 | 7 | 1:19.83 | ||||
| 39 | 1 | 1 | 1:19.91 |
The semifinals were started on 13 December at 20:06.[3]
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 4 | 58.33 | Q | |||
| 2 | 6 | 58.54 | Q | |||
| 3 | 3 | 58.60 | Q | |||
| 4 | 5 | 58.64 | Q | |||
| 5 | 7 | 59.46 | ||||
| 6 | 2 | 59.85 | ||||
| 7 | 1 | |||||
| 8 | 8 |
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 4 | 57.69 | Q | |||
| 2 | 5 | 58.04 | Q | |||
| 3 | 2 | 58.20 | Q | |||
| 4 | 6 | 58.60 | Q | |||
| 5 | 3 | 58.94 | ||||
| 6 | 7 | 58.97 | ||||
| 7 | 1 | 59.81 | ||||
| 7 | 1 |
The final was held on 14 December at 19:20.[4]
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 4 | 57.26 | |||||
| 5 | 57.85 | |||||
| 3 | 58.11 | |||||
| 4 | 6 | 58.32 | ||||
| 5 | 2 | 58.47 | ||||
| 6 | 8 | 58.78 | ||||
| 7 | 7 | 59.11 | ||||
| 8 | 1 | 59.18 |