# Swimming at the 2019 World Aquatics Championships – Women's 800 metre freestyle

The Women's 800-metre freestyle competition at the 2019 World Championships was held on 26 and 27 July 2019. Defending champion Katie Ledecky successfully defended her title in 8:13.58 with a final lap comeback against Italy's Simona Quadarella.

## Records

Prior to the competition, the existing world and championship records were as follows.
| World record | Katie Ledecky (USA) | 8:04.79 | Rio de Janeiro, Brazil | 12 August 2016 |
| Competition record | Katie Ledecky (USA) | 8:07.39 | Kazan, Russia | 8 August 2015 |

## Results
### Heats

The heats were started on 26 July at 12:05.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 5 | 5 | Leah Smith | United States | 8:17.23 | Q |
| 2 | 5 | 4 | Katie Ledecky | United States | 8:17.42 | Q |
| 3 | 5 | 3 | Ariarne Titmus | Australia | 8:19.43 | Q |
| 4 | 4 | 5 | Simona Quadarella | Italy | 8:20.86 | Q |
| 5 | 4 | 4 | Wang Jianjiahe | China | 8:20.91 | Q |
| 6 | 4 | 3 | Sarah Köhler | Germany | 8:22.95 | Q |
| 7 | 5 | 7 | Mireia Belmonte | Spain | 8:28.22 | Q |
| 8 | 4 | 6 | Kiah Melverton | Australia | 8:29.70 | Q |
| 9 | 5 | 1 | Tjaša Oder | Slovenia | 8:30.97 | |
| 10 | 5 | 6 | Ajna Késely | Hungary | 8:32.34 | |
| 11 | 5 | 8 | Jimena Pérez | Spain | 8:32.38 | |
| 12 | 5 | 2 | Anna Egorova | Russia | 8:34.73 | |
| 13 | 4 | 1 | Julia Hassler | Liechtenstein | 8:34.91 | |
| 14 | 3 | 3 | Giulia Gabbrielleschi | Italy | 8:35.03 | |
| 15 | 4 | 7 | Li Bingjie | China | 8:37.41 | |
| 16 | 5 | 0 | Anastasiya Kirpichnikova | Russia | 8:37.90 | |
| 17 | 3 | 5 | Tamila Holub | Portugal | 8:38.77 | |
| 18 | 4 | 8 | Mackenzie Padington | Canada | 8:39.58 | |
| 19 | 5 | 9 | Viviane Jungblut | Brazil | 8:42.52 | |
| 20 | 4 | 9 | Diana Durães | Portugal | 8:44.37 | |
| 21 | 3 | 6 | Eve Thomas | New Zealand | 8:44.65 | |
| 22 | 3 | 4 | Marlene Kahler | Austria | 8:45.13 | |
| 23 | 3 | 2 | Gan Ching Hwee | Singapore | 8:47.88 | |
| 24 | 3 | 8 | Duné Coetzee | South Africa | 8:47.97 | |
| 25 | 2 | 5 | Matea Sumajstorčić | Croatia | 8:48.61 | NR |
| 26 | 3 | 7 | Han Da-kyung | South Korea | 8:49.90 | |
| 27 | 4 | 2 | Boglárka Kapás | Hungary | 8:50.13 | |
| 28 | 3 | 9 | Hanna Eriksson | Sweden | 8:52.14 | |
| 29 | 2 | 2 | Arianna Valloni | San Marino | 8:52.85 | |
| 30 | 2 | 4 | Ho Nam Wai | Hong Kong | 8:53.37 | |
| 31 | 2 | 3 | Laura Lahtinen | Finland | 8:54.94 | |
| 32 | 3 | 0 | Nicole Oliva | Philippines | 8:55.50 | |
| 33 | 2 | 6 | Ammiga Himathongkom | Thailand | 8:57.83 | |
| 34 | 2 | 8 | Julia Arino | Argentina | 9:04.02 | |
| 35 | 2 | 7 | Souad Cherouati | Algeria | 9:12.30 | |
| 36 | 1 | 4 | Eva Petrovska | North Macedonia | 9:12.71 | |
| 37 | 2 | 0 | Gabriella Doueihy | Lebanon | 9:19.78 | |
| 38 | 1 | 3 | Talita Te Flan | Ivory Coast | 9:21.19 | |
| 39 | 1 | 5 | Raya Embury-Brown | Cayman Islands | 9:22.69 | |
| 40 | 2 | 1 | Diana Zlobina | Kazakhstan | 9:31.05 | |
| | 3 | 1 | Joanna Evans | Bahamas | DNS | DNS |
| | 4 | 0 | Kristel Köbrich | Chile | DNS | DNS |

### Final

The final was started on 27 July at 21:25.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 5 | Katie Ledecky | United States | 8:13.58 | |
| | 6 | Simona Quadarella | Italy | 8:14.99 | NR |
| | 3 | Ariarne Titmus | Australia | 8:15.70 | OC |
| 4 | 7 | Sarah Köhler | Germany | 8:16.43 | NR |
| 5 | 4 | Leah Smith | United States | 8:17.10 | |
| 6 | 2 | Wang Jianjiahe | China | 8:18.57 | |
| 7 | 8 | Kiah Melverton | Australia | 8:25.07 | |
| 8 | 1 | Mireia Belmonte | Spain | 8:25.51 | |