2021 FINA World Swimming Championships (25 m) – Men's 1500 metre freestyle
# 2021 FINA World Swimming Championships (25 m) – Men's 1500 metre freestyle

The Men's 1500 metre freestyle competition of the 2021 FINA World Swimming Championships (25 m) was held on 20 and 21 December 2021.

## Records

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

| World record | Gregorio Paltrinieri (ITA) | 14:08.06 | Netanya, Israel | 4 December 2015 |
| - | - | - | - | - |
| Competition record | Mykhailo Romanchuk (UKR) | 14:09.14 | Hangzhou, China | 16 December 2018 |

The following new records were set during this competition:

| Date | Event | Name | Nation | Time | Record |
| - | - | - | - | - | - |
| 21 December | Final | Florian Wellbrock | Germany | 14:06.88 | WR, CR |

## Results

### Heats

The heats were started on 20 December at 11:58.

| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| - | - | - | - | - | - | - |
| 1 | 3 | 5 | Mykhailo Romanchuk | Ukraine | 14:24.76 | Q |
| 2 | 2 | 6 | Ahmed Hafnaoui | Tunisia | 14:25.77 | Q |
| 3 | 3 | 6 | Florian Wellbrock | Germany | 14:25.79 | Q |
| 4 | 3 | 4 | Gregorio Paltrinieri | Italy | 14:28.11 | Q |
| 5 | 2 | 5 | Damien Joly | France | 14:30.90 | Q |
| 6 | 3 | 1 | Daniel Wiffen | Ireland | 14:32.13 | Q, NR |
| 7 | 2 | 3 | Domenico Acerenza | Italy | 14:34.03 | Q |
| 8 | 2 | 4 | Henrik Christiansen | Norway | 14:36.27 | Q |
| 9 | 2 | 2 | Lukas Märtens | Germany | 14:37.60 | |
| 10 | 3 | 8 | Mert Kılavuz | Turkey | 14:39.76 | NR |
| 11 | 2 | 1 | José Paulo Lopes | Portugal | 14:39.82 | NR |
| 12 | 2 | 8 | Nguyễn Huy Hoàng | Vietnam | 14:41.00 | NR |
| 13 | 3 | 2 | Aleksandr Egorov | Russian Swimming Federation | 14:47.39 | |
| 14 | 1 | 5 | Marwan Elkamash | Egypt | 14:48.68 | NR |
| 15 | 2 | 0 | Krzysztof Chmielewski | Poland | 14:51.21 | |
| 16 | 3 | 3 | Jan Micka | Czech Republic | 14:54.55 | |
| 17 | 2 | 7 | Jon Jøntvedt | Norway | 15:01.95 | |
| 18 | 1 | 4 | Matan Roditi | Israel | 15:05.05 | |
| 19 | 3 | 7 | Kim Woo-min | South Korea | 15:06.13 | |
| 20 | 2 | 9 | Dimitrios Markos | Greece | 15:07.43 | |
| 21 | 1 | 3 | Kushagra Rawat | India | 15:07.86 | |
| 22 | 3 | 9 | Zhang Ziyang | China | 15:18.99 | |
| 23 | 1 | 6 | Eduardo Cisternas | Chile | 15:23.30 | NR |
| 24 | 1 | 7 | Adib Khalil | Lebanon | 15:27.12 | NR |
| 25 | 1 | 0 | Loris Bianchi | San Marino | 15:38.63 | |
| 26 | 1 | 2 | Joseph Macías | Ecuador | 15:47.50 | |
| 27 | 1 | 1 | Johan Nónskarð Dam | Faroe Islands | 16:09.94 | |
| 28 | 1 | 8 | Nikoli Blackman | Trinidad and Tobago | 16:34.53 | |
| 29 | 1 | 9 | Mark Imazu | Guam | 17:59.68 | |
| | 3 | 0 | Michael Brinegar | United States | DNS | |

### Final

The final was held on 21 December at 18:06.

| Rank | Lane | Name | Nationality | Time | Notes |
| - | - | - | - | - | - |
| | 3 | Florian Wellbrock | Germany | 14:06.88 | WR |
| | 5 | Ahmed Hafnaoui | Tunisia | 14:10.94 | AF |
| | 4 | Mykhailo Romanchuk | Ukraine | 14:11.47 | |
| 4 | 6 | Gregorio Paltrinieri | Italy | 14:21.00 | |
| 5 | 1 | Domenico Acerenza | Italy | 14:24.31 | |
| 6 | 2 | Damien Joly | France | 14:25.62 | |
| 7 | 8 | Henrik Christiansen | Norway | 14:30.78 | |
| 8 | 7 | Daniel Wiffen | Ireland | 14:36.78 | |
