| Event: | Women's 100 metre breaststroke |
| Championship: | 2015 World Aquatics Championships |
| Dates: | 3 August (heats and semifinals) 4 August (final) |
| Competitors: | 70 |
| Nations: | 61 |
| Win Value: | 1:05.66 |
| Gold: | Yuliya Yefimova |
| Goldnoc: | RUS |
| Silver: | Rūta Meilutytė |
| Silvernoc: | LTU |
| Bronze: | Alia Atkinson |
| Bronzenoc: | JAM |
| Prev: | 2013 |
| Next: | 2017 |
The Women's 100 metre breaststroke 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 10:07.[2]
| Rank | Heat | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|---|
| 1 | 6 | 4 | 1:06.31 | Q | |||
| 2 | 6 | 3 | 1:06.45 | Q | |||
| 3 | 6 | 5 | 1:06.68 | Q | |||
| 4 | 7 | 4 | 1:06.75 | Q | |||
| 5 | 7 | 5 | 1:06.81 | Q | |||
| 6 | 7 | 9 | 1:06.87 | Q, NR | |||
| 7 | 7 | 6 | 1:06.97 | Q | |||
| 8 | 5 | 3 | 1:07.09 | Q | |||
| 8 | 7 | 3 | 1:07.09 | Q | |||
| 10 | 5 | 2 | 1:07.13 | Q | |||
| 11 | 6 | 8 | 1:07.29 | Q, NR | |||
| 12 | 6 | 2 | 1:07.32 | Q | |||
| 13 | 5 | 4 | 1:07.39 | Q | |||
| 14 | 5 | 9 | 1:07.52 | Q | |||
| 14 | 6 | 6 | 1:07.52 | Q | |||
| 16 | 5 | 8 | 1:07.58 | Q, NR | |||
| 17 | 6 | 7 | 1:07.60 | ||||
| 18 | 7 | 7 | 1:07.71 | ||||
| 19 | 5 | 5 | 1:07.73 | ||||
| 20 | 5 | 6 | 1:07.81 | ||||
| 21 | 4 | 5 | 1:07.88 | ||||
| 22 | 5 | 1 | 1:07.97 | ||||
| 23 | 6 | 9 | 1:08.04 | ||||
| 24 | 7 | 1 | 1:08.09 | ||||
| 25 | 6 | 1 | 1:08.13 | ||||
| 26 | 5 | 7 | 1:08.27 | ||||
| 26 | 7 | 2 | 1:08.27 | ||||
| 28 | 7 | 8 | 1:09.08 | ||||
| 29 | 7 | 0 | 1:09.10 | ||||
| 30 | 5 | 0 | 1:09.17 | ||||
| 31 | 6 | 0 | 1:09.27 | ||||
| 32 | 4 | 3 | 1:09.34 | ||||
| 33 | 4 | 8 | 1:09.38 | ||||
| 34 | 3 | 9 | 1:09.49 | NR | |||
| 35 | 4 | 2 | 1:09.71 | ||||
| 36 | 4 | 6 | 1:10.14 | ||||
| 37 | 4 | 7 | 1:10.19 | ||||
| 38 | 3 | 5 | 1:10.68 | ||||
| 39 | 3 | 1 | 1:10.70 | ||||
| 39 | 4 | 1 | 1:10.70 | ||||
| 41 | 4 | 9 | 1:10.83 | ||||
| 42 | 2 | 4 | 1:11.22 | ||||
| 43 | 4 | 0 | 1:11.39 | ||||
| 44 | 3 | 4 | 1:11.45 | ||||
| 45 | 3 | 7 | 1:11.46 | ||||
| 46 | 3 | 2 | 1:11.76 | ||||
| 47 | 3 | 0 | 1:12.07 | ||||
| 48 | 4 | 4 | 1:12.77 | ||||
| 49 | 3 | 6 | 1:13.68 | ||||
| 50 | 3 | 8 | 1:13.88 | ||||
| 51 | 3 | 3 | 1:14.52 | ||||
| 52 | 2 | 5 | 1:15.17 | ||||
| 53 | 2 | 7 | 1:16.02 | ||||
| 54 | 2 | 0 | 1:16.85 | ||||
| 55 | 2 | 8 | 1:17.13 | ||||
| 56 | 2 | 3 | 1:17.23 | ||||
| 57 | 2 | 2 | 1:17.97 | ||||
| 58 | 2 | 1 | 1:18.11 | ||||
| 59 | 2 | 6 | 1:18.28 | ||||
| 60 | 2 | 9 | 1:19.53 | ||||
| 61 | 1 | 3 | 1:19.85 | ||||
| 62 | 1 | 2 | 1:20.81 | ||||
| 63 | 1 | 5 | 1:21.06 | ||||
| 64 | 1 | 4 | 1:21.54 | ||||
| 65 | 1 | 7 | 1:23.19 | ||||
| 66 | 1 | 6 | 1:25.11 | ||||
| 67 | 1 | 1 | 1:27.80 | ||||
| 68 | 1 | 0 | 1:28.59 | ||||
| 69 | 1 | 8 | 1:32.10 | ||||
| 1 | 9 |
The semifinals were held on 3 August at 17:58.[3]
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 5 | 1:05.64 | Q | |||
| 2 | 4 | 1:06.28 | Q | |||
| 3 | 6 | 1:06.76 | Q | |||
| 4 | 3 | 1:07.11 | Q | |||
| 5 | 1 | 1:07.24 | ||||
| 6 | 7 | 1:07.54 | ||||
| 7 | 8 | 1:07.60 | ||||
| 8 | 2 | 1:08.02 |
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 4 | 1:05.60 | Q | |||
| 2 | 2 | 1:06.21 | Q, NR | |||
| 3 | 3 | 1:06.64 | Q | |||
| 4 | 8 | 1:06.95 | Q | |||
| 5 | 6 | 1:07.19 | ||||
| 6 | 5 | 1:07.22 | ||||
| 7 | 1 | 1:07.42 | ||||
| 8 | 7 | 1:07.75 |
The final was held on 4 August at 19:17.[4]
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 4 | 1:05.66 | |||||
| 5 | 1:06.36 | |||||
| 3 | 1:06.42 | |||||
| 4 | 2 | 1:06.43 | ||||
| 5 | 6 | 1:06.55 | ||||
| 6 | 8 | 1:07.10 | ||||
| 7 | 7 | 1:07.17 | ||||
| 8 | 1 | 1:07.60 |