The Women's 800 metre freestyle competition at the 2022 World Aquatics Championships was held on 23 and 24 June 2022.

Records Prior to the competition, the existing world and championship records were as follows.

Results Heats The heats were started on 23 June at 10:31.

Rank Heat Lane Name Nationality Time Notes 1 3 4 Katie Ledecky 8:17.51 Q 2 3 3 Lani Pallister 8:24.66 3 2 5 Leah Smith 8:25.19 Q 4 3 5 Li Bingjie 8:27.19 Q 5 3 6 Isabel Marie Gose 8:27.69 Q 6 3 7 Eve Thomas 8:27.82 Q 7 2 4 Simona Quadarella 8:27.96 Q 8 2 3 Kiah Melverton 8:30.68 Q 9 2 7 Viviane Jungblut 8:32.26 Q 10 2 2 Miyu Namba 8:32.91 11 3 1 Kristel Köbrich 8:37.02 12 3 2 Ajna Késely 8:38.64 13 3 8 Gabrielle Roncatto 8:38.65 14 2 6 Tang Muhan 8:39.46 15 2 0 Diana Durães 8:41.37 16 2 8 Ángela Martínez 8:45.12 17 3 0 Katrina Bellio 8:45.67 18 3 9 Han Da-kyung 8:49.18 19 1 4 Arianna Valloni 8:59.95 20 1 5 Võ Thị Mỹ Thiện 9:12.87 21 1 3 Vár Erlingsdóttir Eidesgaard 9:16.94 1 2 Talita Te Flan 1 6 Arianna Lont 2 1 Paula Otero 2 9 Gan Ching Hwee

Final The final was held on 24 June at 19:26.

Rank Lane Name Nationality Time Notes 4 Katie Ledecky 8:08.04 1 Kiah Melverton 8:18.77 7 Simona Quadarella 8:19.00 4 5 Leah Smith 8:20.04 5 3 Li Bingjie 8:23.15 6 6 Isabel Marie Gose 8:23.78 7 2 Eve Thomas 8:30.37 8 8 Viviane Jungblut 8:37.04

References