| Event: | Women's 50 metre backstroke |
| Championship: | 2015 World Aquatics Championships |
| Dates: | 5 August (heats and semifinals) 6 August (final) |
| Competitors: | 53 |
| Nations: | 48 |
| Win Value: | 27.11 |
| Gold: | Fu Yuanhui |
| Goldnoc: | CHN |
| Silver: | Etiene Medeiros |
| Silvernoc: | BRA |
| Bronze: | Liu Xiang |
| Bronzenoc: | CHN |
| Prev: | 2013 |
| Next: | 2017 |
The Women's 50 metre backstroke competition of the swimming events at the 2015 World Aquatics Championships was held on 5 August with the heats and the semifinals and 6 August with the final.[1]
Prior to the competition, the existing world and championship records were as follows.
The heats were held on 5 August at 09:30.[2]
| Rank | Heat | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|---|
| 1 | 4 | 4 | 27.66 | Q | |||
| 2 | 6 | 4 | 27.74 | Q | |||
| 3 | 5 | 4 | 27.75 | Q | |||
| 4 | 5 | 5 | 27.79 | Q | |||
| 5 | 4 | 5 | 27.89 | Q | |||
| 6 | 6 | 5 | 27.94 | Q | |||
| 7 | 4 | 6 | 28.02 | Q, NR | |||
| 7 | 6 | 3 | 28.02 | Q | |||
| 9 | 5 | 6 | 28.15 | Q | |||
| 9 | 6 | 2 | 28.15 | Q | |||
| 11 | 6 | 6 | 28.18 | Q | |||
| 12 | 6 | 0 | 28.35 | Q | |||
| 13 | 4 | 7 | 28.36 | Q | |||
| 14 | 6 | 8 | 28.40 | Q | |||
| 15 | 6 | 1 | 28.46 | Q | |||
| 16 | 5 | 2 | 28.52 | Q | |||
| 17 | 5 | 8 | 28.62 | ||||
| 18 | 5 | 0 | 28.63 | ||||
| 19 | 5 | 9 | 28.66 | ||||
| 20 | 5 | 3 | 28.67 | ||||
| 20 | 5 | 1 | 28.67 | ||||
| 22 | 6 | 9 | 28.70 | ||||
| 23 | 4 | 0 | 28.75 | ||||
| 24 | 5 | 7 | 28.85 | ||||
| 25 | 6 | 7 | 28.86 | ||||
| 26 | 4 | 1 | 28.87 | ||||
| 27 | 3 | 5 | 28.94 | ||||
| 28 | 4 | 8 | 28.97 | ||||
| 29 | 4 | 9 | 29.15 | ||||
| 30 | 3 | 4 | 29.33 | ||||
| 31 | 2 | 5 | 29.36 | ||||
| 32 | 3 | 6 | 29.37 | ||||
| 33 | 3 | 3 | 29.50 | ||||
| 34 | 3 | 2 | 29.60 | ||||
| 35 | 3 | 0 | 29.61 | ||||
| 36 | 3 | 7 | 29.95 | ||||
| 37 | 3 | 9 | 30.14 | ||||
| 38 | 2 | 4 | 30.17 | ||||
| 39 | 3 | 1 | 30.33 | ||||
| 40 | 2 | 3 | 30.77 | ||||
| 41 | 2 | 2 | 30.89 | ||||
| 42 | 3 | 8 | 30.94 | ||||
| 43 | 2 | 7 | 31.74 | ||||
| 44 | 2 | 6 | 32.33 | ||||
| 45 | 2 | 1 | 33.04 | ||||
| 46 | 2 | 0 | 33.65 | ||||
| 47 | 2 | 8 | 33.67 | ||||
| 48 | 2 | 9 | 33.75 | ||||
| 49 | 1 | 4 | 35.44 | ||||
| 50 | 1 | 5 | 38.48 | ||||
| 51 | 1 | 3 | 38.81 | ||||
| 52 | 1 | 6 | 40.40 | ||||
| 4 | 2 | ||||||
| 4 | 3 |
The semifinals were held at 17:42.[3]
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 4 | 27.41 | Q | |||
| 2 | 5 | 27.67 | Q | |||
| 3 | 6 | 27.83 | Q | |||
| 4 | 3 | 27.88 | Q | |||
| 5 | 7 | 28.01 | Q, NR | |||
| 6 | 2 | 28.11 | ||||
| 7 | 8 | 28.39 | ||||
| 8 | 1 | 28.59 |
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 4 | 27.18 | Q | |||
| 2 | 3 | 27.63 | Q, NR | |||
| 3 | 5 | 27.70 | Q | |||
| 4 | 8 | 28.16 | ||||
| 5 | 7 | 28.21 | ||||
| 6 | 2 | 28.28 | ||||
| 7 | 6 | 28.30 | ||||
| 8 | 1 | 28.46 |
The final was held at 18:49.[4]
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 4 | 27.11 | |||||
| 5 | 27.26 | AM | ||||
| 6 | 27.58 | |||||
| 4 | 2 | 27.66 | ||||
| 5 | 3 | 27.73 | ||||
| 6 | 7 | 27.92 | ||||
| 7 | 1 | 27.99 | ||||
| 8 | 8 | 28.17 |