| Event: | Women's 50 metre breaststroke |
| Championship: | 2017 World Aquatics Championships |
| Dates: | 29 July (heats and semifinals) 30 July (final) |
| Venue: | Danube Arena |
| Location: | Budapest, Hungary |
| Competitors: | 53 |
| Nations: | 48 |
| Win Value: | 29.40 WR |
| Gold: | Lilly King |
| Gold Nation: | USA |
| Silver: | Yuliya Yefimova |
| Silver Nation: | RUS |
| Bronze: | Katie Meili |
| Bronze Nation: | USA |
| Prev: | 2015 |
| Next: | 2019 |
The Women's 50 metre breaststroke competition at the 2017 World Championships was held on 29 and 30 July 2017.[1] [2]
Prior to the competition, the existing world and championship records were as follows.
The following new records were set during this competition.
The heats were held on 29 July at 10:07.[3]
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
|---|---|---|---|---|---|---|
| 1 | 6 | 4 | 29.76 | Q | ||
| 2 | 5 | 4 | 29.99 | Q | ||
| 3 | 5 | 3 | 30.33 | Q, NR | ||
| 4 | 6 | 5 | 30.37 | Q | ||
| 5 | 4 | 5 | 30.40 | Q | ||
| 6 | 4 | 4 | 30.58 | Q | ||
| 7 | 5 | 6 | 30.59 | Q | ||
| 8 | 5 | 5 | 30.71 | Q | ||
| 9 | 4 | 2 | 30.81 | Q | ||
| 10 | 6 | 6 | 30.82 | Q | ||
| 11 | 4 | 6 | 30.88 | Q | ||
| 12 | 6 | 7 | 30.89 | Q | ||
| 13 | 4 | 3 | 30.92 | Q | ||
| 14 | 6 | 3 | 30.95 | Q | ||
| 15 | 5 | 1 | 31.02 | Q | ||
| 16 | 4 | 1 | 31.22 | Q | ||
| 17 | 6 | 8 | 31.29 | |||
| 18 | 4 | 7 | 31.31 | |||
| 19 | 6 | 2 | 31.33 | |||
| 20 | 5 | 2 | 31.44 | |||
| 21 | 5 | 7 | 31.65 | NR | ||
| 22 | 6 | 1 | 31.69 | |||
| 23 | 4 | 8 | 31.70 | |||
| 24 | 3 | 4 | 31.75 | |||
| 25 | 6 | 0 | 31.91 | |||
| 26 | 5 | 0 | 31.92 | |||
| 27 | 4 | 0 | 31.94 | |||
| 28 | 5 | 8 | 32.04 | |||
| 29 | 4 | 9 | 32.24 | |||
| 30 | 6 | 9 | 32.59 | |||
| 31 | 5 | 9 | 32.62 | |||
| 32 | 3 | 6 | 32.72 | |||
| 33 | 3 | 2 | 33.46 | NR | ||
| 34 | 3 | 5 | 33.77 | |||
| 35 | 3 | 3 | 33.85 | |||
| 36 | 3 | 7 | 34.40 | |||
| 37 | 3 | 8 | 34.88 | |||
| 38 | 3 | 1 | 34.91 | |||
| 39 | 1 | 4 | Jang Myong-gyong | 35.11 | ||
| 40 | 2 | 1 | 35.85 | |||
| 41 | 2 | 3 | 36.53 | |||
| 42 | 2 | 4 | 36.97 | |||
| 43 | 3 | 0 | 37.06 | |||
| 44 | 2 | 7 | 37.89 | |||
| 45 | 1 | 7 | 38.47 | |||
| 46 | 2 | 2 | 38.67 | |||
| 47 | 1 | 6 | 39.74 | |||
| 48 | 2 | 0 | 40.57 | |||
| 49 | 2 | 6 | 42.03 | |||
| 50 | 1 | 1 | 46.49 | |||
| 51 | 3 | 9 | 49.38 | |||
| 52 | 2 | 5 | 53.04 | |||
| 1 | 5 | |||||
| 1 | 2 | |||||
| 2 | 8 | |||||
| 2 | 9 | |||||
The semifinals were held on 29 July at 17:56.[4]
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 4 | 29.73 | Q | |||
| 2 | 5 | 30.12 | Q | |||
| 3 | 3 | 30.40 | Q | |||
| 4 | 6 | 30.46 | Q | |||
| 5 | 2 | 30.92 | ||||
| 6 | 1 | 30.95 | ||||
| 7 | 7 | 30.98 | ||||
| 8 | 8 | 31.14 |
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 1 | 4 | 29.60 | Q, AM | |||
| 2 | 3 | 30.41 | Q | |||
| 3 | 5 | 30.46 | Q | |||
| 4 | 8 | 30.49 | Q | |||
| 5 | 6 | 30.67 | ||||
| 6 | 7 | 30.71 | NR | |||
| 7 | 2 | 30.82 | ||||
| 8 | 1 | 31.16 |
The final was held on 30 July at 17:32.[5]
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 4 | 29.40 | WR | ||||
| 5 | 29.57 | |||||
| 3 | 29.99 | |||||
| 4 | 6 | 30.20 | ||||
| 5 | 2 | 30.31 | ||||
| 6 | 7 | 30.62 | ||||
| 7 | 1 | 30.74 | ||||
| 8 | 8 | 30.80 |