Swimming at the 2007 World Aquatics Championships – Men's 800 metre freestyle Heats Heats

| Rank_ | Heat_Lane | Name_ | Nationality | Time_ |
|---|---|---|---|---|
| 1 | 5 : 4 | Craig Stevens | Australia | 7:50.72 |
| 2 | 4 : 5 | Federico Colbertaldo | Italy | 7:50.77 |
| 3 | 6 : 3 | Oussama Mellouli | Tunisia | 7:51.48 |
| 4 | 6 : 2 | Ryan Cochrane | Canada | 7:51.55 |
| 5 | 6 : 4 | Grant Hackett | Australia | 7:51.86 |
| 6 | 5 : 5 | Przemysław Stańczyk | Poland | 7:52.40 |
| 7 | 4 : 7 | Sergiy Fesenko | Ukraine | 7:52.64 |
| 8 | 4 : 3 | Sébastien Rouault | France | 7:52.92 |
| 9 | 5 : 6 | Peter Vanderkaay | USA | 7:54.37 |
| 10 | 5 : 2 | Erik Vendt | USA | 7:54.48 |
| 11 | 5 : 1 | Luka Turk | Slovenia | 7:54.58 |
| 12 | 6 : 6 | Nikita Lobintsev | Russia | 7:56.91 |