Swimming at the 2007 World Aquatics Championships – Men's 100 metre freestyle Heats Heats

| Rank_ | Heat | Lane | Name_ | Nationality |
|---|---|---|---|---|
| 1 | 21 | 5 | Jason Lezak | USA |
| 2 | 22 | 3 | Filippo Magnini | Italy |
| 3 | 21 | 3 | Pieter van den Hoogenband | Netherlands |
| 4 | 22 | 7 | Alain Bernard | France |
| 5 | 20 | 4 | Brent Hayden | Canada |
| 5 | 21 | 4 | Simon Burnett | Great Britain |
| 7 | 22 | 6 | Eamon Sullivan | Australia |
| 8 | 20 | 1 | Ryk Neethling | South Africa |
| 9 | 22 | 5 | César Cielo | Brazil |
| 10 | 20 | 5 | Stefan Nystrand | Sweden |
| 11 | 22 | 8 | Albert Subirats Altes | Venezuela |
| 12 | 18 | 4 | Dominik Meichtry | Switzerland |
| 12 | 21 | 7 | Ashley Callus | Australia |
| 14 | 19 | 4 | Mitja Zastrow | Netherlands |
| 15 | 22 | 4 | Roland Schoeman | South Africa |