Swimming at the 2015 World Aquatics Championships – Women's 100 metre backstroke
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.
Records
Prior to the competition, the existing world and championship records were as follows.Results
Heats
The heats were held on 3 August at 09:30.| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 5 | 5 | Katinka Hosszú | Q,, NR | ||
| 2 | 7 | 4 | Emily Seebohm | Q | ||
| 3 | 6 | 4 | Madison Wilson | Q | ||
| 4 | 5 | 4 | Mie Nielsen | Q | ||
| 5 | 7 | 5 | Missy Franklin | Q | ||
| 6 | 5 | 1 | Anastasia Fesikova | Q | ||
| 7 | 5 | 6 | Lauren Quigley | 1:00.14 | Q | |
| 7 | 6 | 8 | Kirsty Coventry | 1:00.14 | Q | |
| 9 | 5 | 0 | Eygló Ósk Gústafsdóttir | 1:00.25 | Q, NR | |
| 10 | 7 | 3 | Etiene Medeiros | 1:00.33 | Q | |
| 11 | 6 | 6 | Elizabeth Simmonds | 1:00.38 | Q | |
| 12 | 4 | 3 | Michelle Coleman | 1:00.55 | Q, | |
| 12 | 6 | 5 | Fu Yuanhui | 1:00.55 | Q | |
| 14 | 6 | 3 | Chen Jie | 1:00.58 | Q | |
| 15 | 4 | 8 | Alicja Tchórz | 1:00.61 | Q, NR | |
| 15 | 7 | 2 | Dominique Bouchard | 1:00.61 | Q | |
| 17 | 7 | 6 | Kathleen Baker | 1:00.62 | Q | |
| 18 | 5 | 7 | Hilary Caldwell | 1:00.69 | Q | |
| 19 | 4 | 6 | Lisa Graf | 1:00.71 | ||
| 20 | 7 | 7 | Simona Baumrtová | 1:00.91 | ||
| 21 | 6 | 7 | Jenny Mensing | 1:00.97 | ||
| 22 | 5 | 3 | Daria Ustinova | 1:01.00 | ||
| 23 | 5 | 8 | Mimosa Jallow | 1:01.10 | NR | |
| 23 | 6 | 2 | Elena Gemo | 1:01.10 | ||
| 25 | 3 | 5 | Theodora Drakou | 1:01.15 | NR | |
| 26 | 4 | 1 | Bobbie Gichard | 1:01.26 | ||
| 27 | 3 | 4 | Stephanie Au | 1:01.41 | ||
| 28 | 7 | 9 | Katarína Listopadová | 1:01.61 | ||
| 29 | 7 | 8 | Yekaterina Rudenko | 1:01.62 | ||
| 29 | 7 | 0 | Sayaka Akase | 1:01.62 | ||
| 31 | 6 | 1 | Duane Da Rocha | 1:01.63 | ||
| 32 | 5 | 2 | Daryna Zevina | 1:01.68 | ||
| 33 | 4 | 5 | Mathilde Cini | 1:01.77 | ||
| 34 | 7 | 1 | Beryl Gastaldello | 1:01.91 | ||
| 35 | 6 | 9 | Gisela Morales | 1:02.09 | ||
| 36 | 4 | 9 | Park Han-byeol | 1:02.12 | ||
| 37 | 6 | 0 | Margherita Panziera | 1:02.17 | ||
| 38 | 4 | 4 | Andrea Berrino | 1:02.37 | ||
| 39 | 3 | 7 | Yulduz Kuchkarova | 1:02.80 | ||
| 40 | 3 | 6 | Ekaterina Avramova | 1:02.81 | ||
| 41 | 3 | 2 | Jördis Steinegger | 1:02.99 | ||
| 42 | 4 | 0 | Carolina Colorado Henao | 1:03.26 | ||
| 43 | 5 | 9 | Maaike de Waard | 1:03.81 | ||
| 44 | 3 | 3 | Matea Samardžić | 1:04.07 | ||
| 45 | 3 | 8 | Zanre Oberholzer | 1:04.09 | ||
| 46 | 2 | 4 | Karen Vilorio | 1:04.54 | ||
| 47 | 2 | 5 | Inés Remersaro | 1:04.73 | ||
| 48 | 3 | 9 | Jessika Cossa | 1:04.96 | ||
| 49 | 2 | 3 | Kimiko Raheem | FINA Independent Athletes | 1:05.61 | |
| 50 | 4 | 7 | Lourdes Villasenor | 1:05.76 | ||
| 51 | 3 | 0 | Roxanne Yu | 1:06.10 | ||
| 52 | 2 | 6 | Heather Arseth | 1:06.25 | ||
| 53 | 3 | 1 | Anak Ratih | 1:06.34 | ||
| 54 | 2 | 1 | Lara Butler | 1:06.71 | ||
| 55 | 4 | 2 | Andrea García | 1:06.77 | ||
| 56 | 2 | 7 | Talisa Lanoe | 1:07.05 | ||
| 57 | 2 | 2 | Caylee Watson | 1:07.34 | ||
| 58 | 1 | 4 | Gaurika Singh | 1:08.12 | ||
| 59 | 2 | 8 | Evelina Afoa | 1:08.43 | ||
| 60 | 2 | 0 | Noura Mana | 1:10.79 | ||
| 61 | 2 | 9 | Ani Poghosyan | 1:10.82 | ||
| 62 | 1 | 5 | Enkhkhuslen Batbayar | 1:13.52 | ||
| 63 | 1 | 3 | Flaka Pruthi | 1:14.29 | ||
| 64 | 1 | 6 | Awa Ly N'diaye | 1:16.27 | ||
| 65 | 1 | 2 | Roylin Akiwo | 1:20.72 | ||
| 66 | 1 | 7 | Nada Al-Bedwawi | 1:35.83 |
Semifinals
The semifinals were held on 3 August at 18:24.Semifinal 1
| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Madison Wilson | Q | ||
| 2 | 5 | Missy Franklin | Q | ||
| 3 | 3 | Lauren Quigley | Q | ||
| 4 | 1 | Dominique Bouchard | 1:00.31 | ||
| 5 | 8 | Hilary Caldwell | 1:00.39 | ||
| 6 | 2 | Elizabeth Simmonds | 1:00.40 | ||
| 7 | 7 | Chen Jie | 1:00.42 | ||
| 8 | 6 | Eygló Ósk Gústafsdóttir | 1:00.69 |
Semifinal 2
| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | Emily Seebohm | Q | ||
| 2 | 5 | Mie Nielsen | Q, NR | ||
| 3 | 7 | Fu Yuanhui | Q | ||
| 4 | 3 | Anastasia Fesikova | Q | ||
| 5 | 8 | Kathleen Baker | Q | ||
| 6 | 2 | Etiene Medeiros | |||
| 7 | 6 | Kirsty Coventry | 1:00.09 | ||
| 8 | 1 | Alicja Tchórz | 1:01.09 |
Final
The final was held on 4 August at 17:40.| Rank | Lane | Name | Nationality | Time | Notes |
| 4 | Emily Seebohm | 58.26 | |||
| 3 | Madison Wilson | 58.75 | |||
| 5 | Mie Nielsen | 58.86 | |||
| 4 | 6 | Fu Yuanhui | 59.02 | ||
| 5 | 2 | Missy Franklin | 59.40 | ||
| 6 | 7 | Anastasia Fesikova | 59.66 | ||
| 7 | 8 | Lauren Quigley | 59.78 | ||
| 8 | 1 | Kathleen Baker | 59.99 |