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.Results
Heats
The heats were started on 26 July at 12:05.Final
The final was started on 27 July at 21:25.
| Rank | Lane | Name | Nationality | Time | Notes |
| 5 | Katie Ledecky | | 8:13.58 | |
| 6 | Simona Quadarella | | 8:14.99 | NR |
| 3 | Ariarne Titmus | | 8:15.70 | OC |
| 4 | 7 | Sarah Köhler | | 8:16.43 | NR |
| 5 | 4 | Leah Smith | | 8:17.10 | |
| 6 | 2 | Wang Jianjiahe | | 8:18.57 | |
| 7 | 8 | Kiah Melverton | | 8:25.07 | |
| 8 | 1 | Mireia Belmonte | | 8:25.51 | |
