| Event: | Women's 100 metre backstroke |
| Championship: | 2015 World Aquatics Championships |
| Dates: | 3 August (heats and semifinals) 4 August (final) |
| Competitors: | 66 |
| Nations: | 56 |
| Win Value: | 58.26 |
| Goldnoc: | AUS |
| Silver: | Madison Wilson |
| Silvernoc: | AUS |
| Bronze: | Mie Nielsen |
| Bronzenoc: | DEN |
| Prev: | 2013 |
| Next: | 2017 |
The Women's 100 metre backstroke competition of the swimming events at the 2015 World Aquatics Championships was held on 3 August with the heats and the semifinals and 4 August with the final.[1]
Prior to the competition, the existing world and championship records were as follows.
The heats were held on 3 August at 09:30.[2]
| Rank | Heat | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|---|
| 1 | 5 | 5 | Q,, NR | ||||
| 2 | 7 | 4 | Q | ||||
| 3 | 6 | 4 | Q | ||||
| 4 | 5 | 4 | Q | ||||
| 5 | 7 | 5 | Q | ||||
| 6 | 5 | 1 | Q | ||||
| 7 | 5 | 6 | 1:00.14 | Q | |||
| 7 | 6 | 8 | 1:00.14 | Q | |||
| 9 | 5 | 0 | 1:00.25 | Q, NR | |||
| 10 | 7 | 3 | 1:00.33 | Q | |||
| 11 | 6 | 6 | 1:00.38 | Q | |||
| 12 | 4 | 3 | 1:00.55 | Q, | |||
| 12 | 6 | 5 | 1:00.55 | Q | |||
| 14 | 6 | 3 | 1:00.58 | Q | |||
| 15 | 4 | 8 | 1:00.61 | Q, NR | |||
| 15 | 7 | 2 | 1:00.61 | Q | |||
| 17 | 7 | 6 | 1:00.62 | Q | |||
| 18 | 5 | 7 | 1:00.69 | Q | |||
| 19 | 4 | 6 | 1:00.71 | ||||
| 20 | 7 | 7 | 1:00.91 | ||||
| 21 | 6 | 7 | 1:00.97 | ||||
| 22 | 5 | 3 | 1:01.00 | ||||
| 23 | 5 | 8 | 1:01.10 | NR | |||
| 23 | 6 | 2 | 1:01.10 | ||||
| 25 | 3 | 5 | 1:01.15 | NR | |||
| 26 | 4 | 1 | 1:01.26 | ||||
| 27 | 3 | 4 | 1:01.41 | ||||
| 28 | 7 | 9 | 1:01.61 | ||||
| 29 | 7 | 8 | 1:01.62 | ||||
| 29 | 7 | 0 | 1:01.62 | ||||
| 31 | 6 | 1 | 1:01.63 | ||||
| 32 | 5 | 2 | 1:01.68 | ||||
| 33 | 4 | 5 | 1:01.77 | ||||
| 34 | 7 | 1 | 1:01.91 | ||||
| 35 | 6 | 9 | 1:02.09 | ||||
| 36 | 4 | 9 | 1:02.12 | ||||
| 37 | 6 | 0 | 1:02.17 | ||||
| 38 | 4 | 4 | 1:02.37 | ||||
| 39 | 3 | 7 | 1:02.80 | ||||
| 40 | 3 | 6 | 1:02.81 | ||||
| 41 | 3 | 2 | 1:02.99 | ||||
| 42 | 4 | 0 | 1:03.26 | ||||
| 43 | 5 | 9 | 1:03.81 | ||||
| 44 | 3 | 3 | 1:04.07 | ||||
| 45 | 3 | 8 | 1:04.09 | ||||
| 46 | 2 | 4 | 1:04.54 | ||||
| 47 | 2 | 5 | 1:04.73 | ||||
| 48 | 3 | 9 | 1:04.96 | ||||
| 49 | 2 | 3 | < | 1:05.61 | |||
| 50 | 4 | 7 | 1:05.76 | ||||
| 51 | 3 | 0 | 1:06.10 | ||||
| 52 | 2 | 6 | 1:06.25 | ||||
| 53 | 3 | 1 | 1:06.34 | ||||
| 54 | 2 | 1 | 1:06.71 | ||||
| 55 | 4 | 2 | 1:06.77 | ||||
| 56 | 2 | 7 | 1:07.05 | ||||
| 57 | 2 | 2 | 1:07.34 | ||||
| 58 | 1 | 4 | 1:08.12 | ||||
| 59 | 2 | 8 | 1:08.43 | ||||
| 60 | 2 | 0 | 1:10.79 | ||||
| 61 | 2 | 9 | 1:10.82 | ||||
| 62 | 1 | 5 | 1:13.52 | ||||
| 63 | 1 | 3 | 1:14.29 | ||||
| 64 | 1 | 6 | 1:16.27 | ||||
| 65 | 1 | 2 | 1:20.72 | ||||
| 66 | 1 | 7 | 1:35.83 |
The semifinals were held on 3 August at 18:24.[3]
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 4 | Q | ||||
| 2 | 5 | Q | ||||
| 3 | 3 | Q | ||||
| 4 | 1 | 1:00.31 | ||||
| 5 | 8 | 1:00.39 | ||||
| 6 | 2 | 1:00.40 | ||||
| 7 | 7 | 1:00.42 | ||||
| 8 | 6 | 1:00.69 |
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 4 | Q | ||||
| 2 | 5 | Q, NR | ||||
| 3 | 7 | Q | ||||
| 4 | 3 | Q | ||||
| 5 | 8 | Q | ||||
| 6 | 2 | |||||
| 7 | 6 | 1:00.09 | ||||
| 8 | 1 | 1:01.09 |
The final was held on 4 August at 17:40.[4]
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 4 | 58.26 | |||||
| 3 | 58.75 | |||||
| 5 | 58.86 | |||||
| 4 | 6 | 59.02 | ||||
| 5 | 2 | 59.40 | ||||
| 6 | 7 | 59.66 | ||||
| 7 | 8 | 59.78 | ||||
| 8 | 1 | 59.99 |