The Women's 800 metre freestyle competition of the 2021 FINA World Swimming Championships (25 m) was held on 17 and 18 December 2021.

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

The following new records were set during this competition: Date Event Name Nation Time Record 18 December Final Li Bingjie 8:02.90 CR

Results Heats The heats were started on 17 December at 11:14.Heats results

Rank Heat Lane Name Nationality Time Notes 1 3 6Li Bingjie 8:10.08 Q 2 4 8 Summer McIntosh 8:13.37 Q, , NR 3 4 5 Isabel Marie Gose 8:13.61 Q 4 3 4 Simona Quadarella 8:14.10 Q 5 4 4 Anastasiya Kirpichnikova Russian Swimming Federation 8:14.53 Q 6 4 3 Martina Caramignoli 8:15.01 Q 7 4 6 Katie Grimes 8:16.01 Q, 8 3 3 Anna Egorova Russian Swimming Federation 8:17.03 Q 9 3 0 Emma Weyant 8:20.65 Q 10 3 5 Ajna Késely 8:21.81 Q 11 3 7 Viviane Jungblut 8:24.78 12 4 0 Viktória Mihályvári-Farkas 8:24.93 13 3 2 Merve Tuncel 8:25.02 14 4 2 Beril Böcekler 8:27.79 14 2 4 María de Valdés 8:28.94 16 2 7 Valentine Dumont 8:29.17 17 4 7 Diana Durães 8:32.17 18 3 9 Jimena Pérez 8:33.12 19 4 9 Gabrielle Roncatto 8:33.81 20 3 1 Ryu Ji-won 8:33.89 21 4 1 Han Da-kyung 8:34.14 22 2 3 Lena Opatril 8:39.56 23 2 0 Kamonchanok Kwanmuang 8:39.81 NR 24 2 5 Delfina Dini 8:40.55 25 2 2 Michaela Pulford 8:41.94 26 2 8 Arianna Valloni 8:44.10 NR 27 2 9 Zhanet Angelova 8:44.88 28 2 6 Matea Sumajstorčić 8:49.05 29 1 5 Daniela Alfaro 8:56.29 30 2 1 Eva Petrovska 8:59.55 31 1 4 Michell Ramírez 9:13.03 1 3 Talita Te Flan DNS 1 6 Iman Kouraogo 3 8 Hou Yawen

Final The final was held on 18 December at 19:41.Final results Rank Lane Name Nationality Time Notes 4 Li Bingjie 8:02.90 CR 6 Anastasiya Kirpichnikova Russian Swimming Federation 8:06.44 3 Simona Quadarella 8:07.99 4 5 Isabel Marie Gose 8:08.26 5 7 Anna Egorova Russian Swimming Federation 8:14.84 6 2 Martina Caramignoli 8:17.60 7 1 Emma Weyant 8:20.13 8 8 Ajna Késely 8:20.18

References