| Event: | Men's 800 metre freestyle |
| Competition: | 2022 FINA World Swimming Championships (25 m) |
| Venue: | Melbourne Sports and Aquatic Centre |
| Location: | Melbourne, Australia |
| Dates: | 17 December |
| Competitors: | 23 |
| Nations: | 20 |
| Win Value: | 7:29.99 CR |
| Gold: | Gregorio Paltrinieri |
| Goldnoc: | ITA |
| Silver: | Henrik Christiansen |
| Silvernoc: | NOR |
| Bronze: | Logan Fontaine |
| Bronzenoc: | FRA |
| Next: | 2024 |
The Men's 800 metre freestyle competition of the 2022 FINA World Swimming Championships (25 m) was held on 17 December 2022.[1]
Prior to the competition, the existing world and championship records were as follows.
The following new records were set during this competition:
The slowest heats were started at 13:12, and the fastest heat at 19:50.[2]
| Rank | Heat | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|---|
| 3 | 4 | 7:29.99 | CR | ||||
| 3 | 2 | 7:31.48 | |||||
| 3 | 3 | 7:33.12 | |||||
| 4 | 3 | 8 | 7:33.78 | AS | |||
| 5 | 3 | 5 | 7:34.33 | ||||
| 6 | 2 | 6 | 7:35.12 | ||||
| 7 | 2 | 5 | 7:36.01 | NR | |||
| 8 | 2 | 7 | 7:37.54 | ||||
| 9 | 3 | 7 | 7:40.64 | ||||
| 10 | 2 | 1 | 7:42.70 | ||||
| 11 | 1 | 5 | 7:44.53 | ||||
| 12 | 2 | 8 | 7:45.29 | ||||
| 13 | 2 | 4 | 7:47.57 | ||||
| 14 | 3 | 1 | 7:48.25 | ||||
| 15 | 2 | 2 | 7:49.53 | NR | |||
| 16 | 2 | 6 | 7:53.36 | ||||
| 17 | 1 | 6 | 7:55.24 | NR | |||
| 18 | 1 | 4 | 7:55.93 | ||||
| 19 | 1 | 3 | 8:05.91 | ||||
| 20 | 1 | 1 | 8:11.47 | ||||
| 21 | 1 | 7 | 8:17.85 | ||||
| 22 | 1 | 8 | 8:21.81 | NR | |||
| 23 | 1 | 2 | 8:22.71 | ||||
| 2 | 3 | Did not start | |||||