Swimming at the 2013 World Aquatics Championships – Women's 50 metre breaststroke
The women's 50 metre breaststroke event in swimming at the 2013 World Aquatics Championships took place on 3–4 August at the Palau Sant Jordi in Barcelona, Spain.
Records
Prior to this competition, the existing world and championship records were:The following new records were set during this competition.
| Date | Event | Name | Nationality | Time | Record |
| 29 July | Heats – Women's 100 metre breaststroke | Rūta Meilutytė | 29.97† | CR | |
| 3 August | Heats | Yuliya Yefimova | 29.78 | , CR | |
| 3 August | Semifinal 2 | Rūta Meilutytė | 29.48 | , CR |
† – en route to final mark
Results
Heats
The heats were held at 10:32.| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 8 | 5 | Yuliya Yefimova | 29.78 | Q, | |
| 2 | 8 | 4 | Jessica Hardy | 29.99 | Q | |
| 3 | 6 | 4 | Rūta Meilutytė | 30.07 | Q | |
| 4 | 7 | 4 | Breeja Larson | 30.46 | Q | |
| 5 | 6 | 5 | Jennie Johansson | 30.55 | Q, NR | |
| 6 | 8 | 6 | Mariya Liver | 30.68 | Q, NR | |
| 7 | 7 | 5 | Petra Chocová | 30.77 | Q, NR | |
| 8 | 8 | 3 | Moniek Nijhuis | 30.82 | Q | |
| 9 | 7 | 6 | Fiona Doyle | 30.93 | Q, NR | |
| 10 | 7 | 3 | Alia Atkinson | 31.12 | Q | |
| 11 | 7 | 8 | Marina García | 31.22 | Q | |
| 12 | 6 | 3 | 31.23 | Q | ||
| 13 | 7 | 7 | Rebecca Ejdervik | 31.39 | Q | |
| 14 | 6 | 8 | He Yuzhe | 31.46 | Q | |
| 15 | 8 | 8 | Samantha Marshall | 31.49 | Q | |
| 16 | 5 | 8 | Hrafnhildur Lúthersdóttir | 31.50 | Q, NR | |
| 17 | 6 | 7 | Michela Guzzetti | 31.51 | ||
| 18 | 7 | 9 | Kim Janssens | 31.52 | NR | |
| 19 | 6 | 2 | Valentina Artemyeva | 31.56 | ||
| 20 | 6 | 6 | Beatriz Travalon | 31.59 | ||
| 21 | 8 | 1 | Viktoriya Solnceva | 31.63 | ||
| 22 | 6 | 9 | Veera Kivirinta | 31.66 | ||
| 23 | 5 | 5 | Amit Ivry | 31.67 | NR | |
| 24 | 7 | 2 | Suo Ran | 31.70 | ||
| 25 | 7 | 1 | Caroline Ruhnau | 31.73 | ||
| 26 | 8 | 0 | Jessica Vall | 31.77 | ||
| 27 | 8 | 2 | Lisa Fissneider | 31.94 | ||
| 28 | 5 | 6 | Kim Go-Eun | 31.95 | ||
| 29 | 7 | 0 | Anna Makinen | 32.02 | ||
| 30 | 8 | 7 | Tera van Beilen | 32.03 | ||
| 31 | 6 | 0 | Henriette Brekke | 32.11 | ||
| 32 | 5 | 7 | Julia Sebastian | 32.28 | ||
| 33 | 8 | 9 | Ivana Ninković | 32.32 | ||
| 34 | 5 | 4 | Rie Kaneto | 32.37 | ||
| 35 | 4 | 7 | Yvette Man Yi Kong | 32.56 | ||
| 36 | 4 | 3 | Mercedes Toledo | 32.61 | NR | |
| 37 | 3 | 4 | Samantha Yeo | 32.69 | ||
| 38 | 5 | 3 | Caroline Reitshammer | 32.72 | ||
| 39 | 5 | 1 | Erica Dittmer | 32.73 | ||
| 40 | 5 | 2 | Sarah Vaisse | 32.74 | ||
| 41 | 4 | 4 | Zuzana Mimovičová | 32.79 | ||
| 42 | 1 | 2 | Dariya Talanova | 32.83 | ||
| 43 | 3 | 6 | Tatiana Chişca | 32.85 | ||
| 44 | 5 | 0 | Ioana Alexandra Popa | 32.96 | ||
| 45 | 4 | 2 | Tara-Lynn Nicholas | 33.04 | ||
| 46 | 4 | 9 | Mai Atef | 33.08 | ||
| 47 | 4 | 8 | Vangelina Draganova | 33.10 | ||
| 47 | 3 | 3 | Christina Loh | 33.10 | ||
| 49 | 5 | 9 | Lei On Kei | 33.37 | ||
| 50 | 4 | 6 | Monica Álvarez | 33.39 | ||
| 50 | 3 | 5 | Chen I-chuan | 33.39 | ||
| 52 | 4 | 5 | Miriam Corsini | 33.45 | ||
| 53 | 4 | 0 | Evita Leter | 33.55 | ||
| 54 | 4 | 1 | Maria Romanjuk | 33.56 | ||
| 55 | 3 | 7 | Pilar Shimizu | 34.20 | ||
| 56 | 3 | 8 | Tilka Paljk | 34.28 | ||
| 57 | 2 | 4 | Vanessa Rivas | 34.52 | NR | |
| 58 | 3 | 9 | Tegan McCarthy | 34.81 | ||
| 59 | 3 | 1 | Rachael Tonjor | 35.41 | ||
| 60 | 3 | 2 | Natalia Gomez | 35.49 | ||
| 61 | 2 | 7 | Mahfuza Khatun | 35.63 | ||
| 62 | 2 | 5 | Shne Joachim | 35.76 | ||
| 63 | 2 | 8 | Bonita Imsirovic | 36.53 | ||
| 64 | 2 | 0 | Teona Bostashvili | 37.04 | ||
| 65 | 3 | 0 | Oreoluwa Cherebin | 37.11 | ||
| 66 | 2 | 6 | Chade Nersicio | 37.43 | ||
| 67 | 2 | 3 | Altansukh Nomin | 37.78 | ||
| 68 | 2 | 9 | Mariam Foum | 38.21 | ||
| 69 | 1 | 4 | Anum Bandey | 38.50 | ||
| 70 | 2 | 2 | Hemthon Vitiny | 39.53 | ||
| 71 | 1 | 3 | Angelika Ouedraogo | 39.58 | ||
| 72 | 1 | 5 | Ramatoulaye Camara | 48.31 | ||
| 73 | 1 | 6 | Haoua Sangare | 49.68 | ||
| 74 | 1 | 7 | Lareiba Seibon | 49.72 | ||
| 2 | 1 | Vanessa Kokoe | ||||
| 6 | 1 | Satomi Suzuki |
Semifinals
The semifinals were held at 18:26.Semifinal 1
Semifinal 2
Final
The final was held at 18:08.| Rank | Lane | Name | Nationality | Time | Notes |
| 5 | Yuliya Yefimova | 29.52 | NR | ||
| 4 | Rūta Meilutytė | 29.59 | |||
| 3 | Jessica Hardy | 29.80 | =AM | ||
| 4 | 6 | Breeja Larson | 29.95 | ||
| 5 | 8 | Jennie Johansson | 30.23 | ||
| 6 | 7 | 30.72 | |||
| 7 | 1 | Moniek Nijhuis | 31.31 | ||
| 2 | Petra Chocová |