# Swimming at the 2009 World Aquatics Championships – Men's 800 metre freestyle

The men's 800 metre freestyle at the 2009 World Championships occurred on the morning of Tuesday, 28 July (heats) and the evening Wednesday 29 July (final) at the Foro Italico in Rome, Italy.

## Records

| World record | Grant Hackett (AUS) | 7:38.65 | Montreal, Canada | 27 July 2005 |
| Championship record | Grant Hackett (AUS) | 7:38.65 | Montreal, Canada | 27 July 2005 |
The following records were established during the competition:
| Date | Round | Name | Nationality | Time | Record |
| 29 July | Final | Zhang Lin | China | 7:32.12 | WR |

## Results
### Heats

| Rank | Name | Nationality | Time | Heat | Lane | Notes |
| 1 | Oussama Mellouli | Tunisia | 7:41.82 | 6 | 5 | AF |
| 2 | Ryan Cochrane | Canada | 7:43.61 | 6 | 4 | AM |
| 3 | Federico Colbertaldo | Italy | 7:44.29 | 4 | 3 | ER |
| 4 | David Davies | United Kingdom | 7:45.89 | 4 | 5 | NR |
| 5 | Yury Prilukov | Russia | 7:46.05 | 5 | 4 | NR |
| 6 | Zhang Lin | China | 7:48.75 | 6 | 3 | |
| 7 | Marco Rivera | Spain | 7:49.09 | 6 | 6 | NR |
| 8 | Peter Vanderkaay | United States | 7:49.71 | 5 | 6 | |
| 9 | Jan Wolfgarten | Germany | 7:50.10 | 5 | 5 | |
| 10 | Robert Hurley | Australia | 7:50.65 | 4 | 6 | |
| 11 | Mads Glæsner | Denmark | 7:52.18 | 6 | 7 | NR |
| 12 | Ryan Napoleon | Australia | 7:53.92 | 5 | 2 | |
| 13 | Ahmed Mathlouthi | Tunisia | 7:55.43 | 4 | 0 | |
| 14 | Jackson Wilcox | United States | 7:57.09 | 5 | 8 | |
| 15 | Tom Vangeneugden | Belgium | 7:59.16 | 6 | 1 | |
| 16 | Samuel Pizzetti | Italy | 7:59.67 | 4 | 4 | |
| 17 | Richard Charlesworth | United Kingdom | 8:00.50 | 5 | 1 | |
| 18 | Pál Joensen | Faroe Islands | 8:01.50 | 6 | 2 | |
| 19 | David Brandl | Austria | 8:02.35 | 5 | 7 | |
| 20 | Esteban Paz | Argentina | 8:03.27 | 4 | 1 | NR |
| 21 | Ryoji Sononaka | Japan | 8:05.12 | 4 | 8 | |
| 22 | Kang Yonghwan | South Korea | 8:05.68 | 3 | 3 | |
| 23 | Ricardo Monasterio | Venezuela | 8:08.64 | 3 | 5 | |
| 24 | Igor Snitko | Ukraine | 8:09.16 | 6 | 8 | |
| 25 | Luis Escobar | Mexico | 8:10.26 | 1 | 1 | |
| 26 | Fabio Pereira | Portugal | 8:11.60 | 5 | 0 | |
| 27 | Florian Janistyn | Austria | 8:11.79 | 4 | 2 | |
| 28 | Oleksandr Lutchenko | Ukraine | 8:12.36 | 1 | 2 | |
| 29 | Alejandro Gómez | Venezuela | 8:13.16 | 3 | 2 | |
| 30 | Mohamed Farhoud | Egypt | 8:14.67 | 6 | 9 | |
| 31 | Xin Tong | China | 8:16.93 | 1 | 7 | |
| 32 | Irakli Revishvili | Georgia | 8:20.55 | 3 | 7 | |
| 33 | Jan Karel Petric | Slovenia | 8:20.94 | 5 | 9 | |
| 34 | Mateo de Angulo | Colombia | 8:22.12 | 3 | 4 | |
| 35 | Daniel Delgadillo | Mexico | 8:25.81 | 6 | 0 | |
| 36 | Pan Kai-Wen | Chinese Taipei | 8:29.57 | 4 | 9 | |
| 37 | Lin Kuan-Ting | Chinese Taipei | 8:33.44 | 3 | 8 | |
| 38 | Hajder Ensar | Bosnia and Herzegovina | 8:35.57 | 2 | 9 | |
| 39 | Ivan Alejandro Enderica | Ecuador | 8:36.04 | 3 | 1 | |
| 40 | Pang Sheng Jun | Singapore | 8:39.69 | 2 | 3 | |
| 41 | Roberto Peñailillo Garcia | Chile | 8:43.89 | 3 | 0 | |
| 42 | Lim Clement | Singapore | 8:44.09 | 2 | 5 | |
| 43 | Allan Gabriel Gutierrez Castro | Honduras | 8:45.18 | 2 | 7 | |
| 44 | Vitalii Khudiakov | Kyrgyzstan | 8:54.03 | 3 | 9 | |
| 45 | Neil Agius | Malta | 8:54.06 | 2 | 6 | |
| 46 | Heimanu Sichan | French Polynesia | 8:55.64 | 2 | 1 | NR |
| 47 | Ngou Pok Man | Macau | 8:56.92 | 2 | 2 | |
| 48 | Omar Núñez | Nicaragua | 8:59.14 | 2 | 8 | |
| 49 | Luis Andres Martorell Name | Honduras | 8:59.58 | 2 | 0 | |
| 50 | Vincent Perry | French Polynesia | 9:11.37 | 1 | 4 | |
| 51 | Cooper Graf | Northern Mariana Islands | 9:38.96 | 1 | 3 | |
| 52 | Shin Kimura | Northern Mariana Islands | 9:40.57 | 1 | 5 | |
| – | Naser Aldaya | Palestine | DNS | 1 | 6 | |
| – | Yamine Jordan | Morocco | DNS | 2 | 4 | |
| – | Sho Uchida | Japan | DNS | 4 | 7 | |
| – | Nicolas Rostoucher | France | DNS | 5 | 3 | |

### Final

| Rank | Name | Nationality | Time | Lane | Notes |
| | Zhang Lin | China | 7:32.12 | 7 | WR |
| | Oussama Mellouli | Tunisia | 7:35.27 | 4 | AF |
| | Ryan Cochrane | Canada | 7:41.92 | 5 | AM |
| 4 | Federico Colbertaldo | Italy | 7:43.84 | 3 | ER |
| 5 | David Davies | United Kingdom | 7:44.32 | 6 | NR |
| 6 | Peter Vanderkaay | United States | 7:48.44 | 8 | |
| 7 | Marco Rivera | Spain | 7:49.46 | 1 | |
| 7 | Yuriy Prilukov | Russia | 7:49.46 | 2 | |