| Event: | Women's 100 metre individual medley |
| Competition: | 2021 FINA World Swimming Championships (25 m) |
| Venue: | Etihad Arena |
| Location: | Abu Dhabi, United Arab Emirates |
| Dates: | 18 December (heats and semifinals) 19 December (final) |
| Competitors: | 44 |
| Nations: | 37 |
| Win Value: | 57.80 NR |
| Gold: | Anastasia Gorbenko |
| Goldnoc: | ISR |
| Silver: | Béryl Gastaldello |
| Silvernoc: | FRA |
| Bronze: | Maria Kameneva |
| Prev: | 2018 |
| Next: | 2022 |
The Women's 100 metre individual medley competition of the 2021 FINA World Swimming Championships (25 m) will be held on 18 and 19 December 2021.[1]
Prior to the competition, the existing world and championship records were as follows.
The heats were started on 18 December at 10:12.[2]
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
|---|---|---|---|---|---|---|
| 1 | 3 | 4 | 58.36 | Q | ||
| 2 | 3 | 3 | 59.05 | Q | ||
| 3 | 4 | 5 | 59.06 | Q | ||
| 4 | 3 | 5 | 59.17 | Q | ||
| 5 | 2 | 5 | 59.19 | Q, NR | ||
| 6 | 4 | 4 | 59.34 | Q | ||
| 7 | 5 | 4 | 59.38 | Q | ||
| 8 | 4 | 3 | 59.44 | Q | ||
| 9 | 3 | 2 | 59.45 | Q | ||
| 9 | 5 | 2 | 59.45 | Q | ||
| 9 | 5 | 3 | 59.45 | Q | ||
| 12 | 5 | 7 | 59.50 | Q | ||
| 13 | 5 | 5 | 59.54 | Q | ||
| 14 | 2 | 2 | 59.56 | Q | ||
| 15 | 2 | 6 | 59.65 | Q, NR | ||
| 15 | 4 | 2 | 59.65 | Q | ||
| 17 | 3 | 6 | ||||
| 18 | 4 | 1 | ||||
| 19 | 3 | 1 | ||||
| 20 | 5 | 9 | ||||
| 21 | 4 | 7 | ||||
| 22 | 5 | 1 | ||||
| 23 | 4 | 9 | ||||
| 24 | 3 | 7 | ||||
| 25 | 5 | 0 | ||||
| 26 | 4 | 8 | ||||
| 27 | 3 | 9 | ||||
| 28 | 3 | 8 | ||||
| 29 | 4 | 0 | ||||
| 30 | 2 | 4 | ||||
| 31 | 3 | 0 | ||||
| 32 | 2 | 3 | ||||
| 33 | 2 | 8 | ||||
| 34 | 2 | 1 | ||||
| 35 | 2 | 7 | ||||
| 36 | 2 | 9 | ||||
| 37 | 3 | 0 | ||||
| 38 | 1 | 4 | ||||
| 39 | 1 | 2 | ||||
| 40 | 1 | 1 | ||||
| 41 | 1 | 3 | ||||
| 42 | 1 | 6 | ||||
| 43 | 1 | 5 | ||||
| 44 | 1 | 7 | ||||
| 4 | 6 | |||||
| 5 | 6 | |||||
| 5 | 8 |
The semifinals were started on 18 December at 19:08.[3]
| Rank | Heat | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|---|
| 1 | 1 | 4 | 58.25 | Q, NR | |||
| 2 | 1 | 3 | 58.45 | Q | |||
| 3 | 2 | 7 | 58.58 | Q | |||
| 4 | 2 | 4 | 58.65 | Q | |||
| 5 | 2 | 6 | 58.66 | Q | |||
| 6 | 1 | 2 | 58.74 | Q | |||
| 7 | 2 | 5 | 58.75 | Q | |||
| 8 | 2 | 1 | 58.96 | Q | |||
| 9 | 1 | 6 | 59.00 | ||||
| 10 | 1 | 1 | 59.01 | ||||
| 11 | 1 | 5 | 59.07 | ||||
| 12 | 2 | 2 | 59.08 | NR | |||
| 13 | 2 | 8 | 59.35 | NR | |||
| 14 | 1 | 7 | 59.56 | ||||
| 15 | 2 | 3 | 59.58 | ||||
| 16 | 1 | 8 | 59.82 |
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 6 | 57.80 | NR | ||||
| 2 | 57.96 | |||||
| 5 | 58.15 | |||||
| 4 | 4 | 58.27 | ||||
| 5 | 3 | 58.66 | ||||
| 6 | 1 | 58.74 | ||||
| 7 | 8 | 59.10 | ||||
| 8 | 7 | 59.37 |