| Event: | Women's 800 metre freestyle |
| Championship: | 2019 World Aquatics Championships |
| Dates: | 26 July (heats) 27 July (final) |
| Venue: | Nambu University Municipal Aquatics Center |
| Location: | Gwangju, South Korea |
| Competitors: | 40 |
| Nations: | 32 |
| Win Value: | 8:13.58 |
| Gold: | Katie Ledecky |
| Gold Nation: | USA |
| Silver: | Simona Quadarella |
| Silver Nation: | ITA |
| Bronze: | Ariarne Titmus |
| Bronze Nation: | AUS |
| Prev: | 2017 |
| Next: | 2022 |
The Women's 800-metre freestyle competition at the 2019 World Championships was held on 26 and 27 July 2019.[1] [2] Defending champion Katie Ledecky successfully defended her title in 8:13.58 with a final lap comeback against Italy's Simona Quadarella.[3]
Prior to the competition, the existing world and championship records were as follows.
The heats were started on 26 July at 12:05.[4]
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
|---|---|---|---|---|---|---|
| 1 | 5 | 5 | 8:17.23 | Q | ||
| 2 | 5 | 4 | 8:17.42 | Q | ||
| 3 | 5 | 3 | 8:19.43 | Q | ||
| 4 | 4 | 5 | 8:20.86 | Q | ||
| 5 | 4 | 4 | 8:20.91 | Q | ||
| 6 | 4 | 3 | 8:22.95 | Q | ||
| 7 | 5 | 7 | 8:28.22 | Q | ||
| 8 | 4 | 6 | 8:29.70 | Q | ||
| 9 | 5 | 1 | 8:30.97 | |||
| 10 | 5 | 6 | 8:32.34 | |||
| 11 | 5 | 8 | 8:32.38 | |||
| 12 | 5 | 2 | 8:34.73 | |||
| 13 | 4 | 1 | 8:34.91 | |||
| 14 | 3 | 3 | 8:35.03 | |||
| 15 | 4 | 7 | 8:37.41 | |||
| 16 | 5 | 0 | 8:37.90 | |||
| 17 | 3 | 5 | 8:38.77 | |||
| 18 | 4 | 8 | 8:39.58 | |||
| 19 | 5 | 9 | 8:42.52 | |||
| 20 | 4 | 9 | 8:44.37 | |||
| 21 | 3 | 6 | 8:44.65 | |||
| 22 | 3 | 4 | 8:45.13 | |||
| 23 | 3 | 2 | 8:47.88 | |||
| 24 | 3 | 8 | 8:47.97 | |||
| 25 | 2 | 5 | 8:48.61 | NR | ||
| 26 | 3 | 7 | 8:49.90 | |||
| 27 | 4 | 2 | 8:50.13 | |||
| 28 | 3 | 9 | 8:52.14 | |||
| 29 | 2 | 2 | 8:52.85 | |||
| 30 | 2 | 4 | 8:53.37 | |||
| 31 | 2 | 3 | 8:54.94 | |||
| 32 | 3 | 0 | 8:55.50 | |||
| 33 | 2 | 6 | 8:57.83 | |||
| 34 | 2 | 8 | 9:04.02 | |||
| 35 | 2 | 7 | 9:12.30 | |||
| 36 | 1 | 4 | 9:12.71 | |||
| 37 | 2 | 0 | 9:19.78 | |||
| 38 | 1 | 3 | 9:21.19 | |||
| 39 | 1 | 5 | 9:22.69 | |||
| 40 | 2 | 1 | 9:31.05 | |||
| 3 | 1 | |||||
| 4 | 0 |
The final was started on 27 July at 21:25.[5]
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 5 | 8:13.58 | |||||
| 6 | 8:14.99 | NR | ||||
| 3 | 8:15.70 | OC | ||||
| 4 | 7 | 8:16.43 | NR | |||
| 5 | 4 | 8:17.10 | ||||
| 6 | 2 | 8:18.57 | ||||
| 7 | 8 | 8:25.07 | ||||
| 8 | 1 | 8:25.51 |