Swimming at the 2009 Southeast Asian Games – Men's 100 metre freestyle
# Swimming at the 2009 Southeast Asian Games – Men's 100 metre freestyle

The Men's 100 Freestyle swimming event at the 2009 SEA Games was held on December 11, 2009.

## Results

### Final

| Place | Swimmer | Nation | Time | Notes |
| - | - | - | - | - |
| 1 | Daniel Bego | Malaysia | 50.16 | GR |
| 2 | Charles Walker | Philippines | 50.96 | NR |
| 3 | Russell Ong | Singapore | 51.05 | |
| 4 | Foo Jian Beng | Malaysia | 51.22 | |
| 5 | Traiady Fauzi | Indonesia | 51.24 | |
| 6 | Guntur Pratama | Indonesia | 51.29 | |
| 7 | Daniel Coakley | Philippines | 51.45 | |
| 8 | Thanyanant P. | Thailand | 52.73 | |

### Preliminary heats

| Rank | Heat | Swimmer | Nation | Time | Notes |
| - | - | - | - | - | - |
| 1 | H2 | Daniel Bego | Malaysia | 51.63 | Q |
| 2 | H2 | Daniel Coakley | Philippines | 51.63 | Q |
| 3 | H2 | Traiady Fauzi | Indonesia | 51.75 | Q |
| 4 | H1 | Guntur Pratama | Indonesia | 51.75 | Q |
| 5 | H1 | Russell Ong | Singapore | 51.93 | Q |
| 6 | H1 | Charles Walker | Philippines | 52.30 | Q |
| 7 | H2 | Foo Jian Beng | Malaysia | 54.33 | Q |
| 8 | H1 | Thanyanant P | Thailand | 52.61 | Q |
| 9 | H1 | Thanh Hai Nguyen | Vietnam | 53.25 | |
| 10 | H2 | Quy Phuoc Hoang | Vietnam | 1:04.36 | |
| 11 | H2 | S Soulasane | Laos | 1:04.36 | |
| 12 | H2 | Sao Sedarath | Cambodia | 1:05.61 | |
| 13 | H1 | S Saylom | Laos | 1:07.70 | |
