Swimming at the 2009 Southeast Asian Games – Women's 200 metre individual medley
# Swimming at the 2009 Southeast Asian Games – Women's 200 metre individual medley

The Women's 200 Individual Medley (or "I.M.") swimming event at the 2009 SEA Games was held on December 10, 2009.

## Results

### Final

| Place | Lane | Swimmer | Nation | Time | Notes |
| - | - | - | - | - | - |
| 1 | 4 | Yi Ting Siow | Malaysia | 2:14.57 | GR |
| 2 | 8 | Natthanan Junkrajang | Thailand | 2:18.98 | |
| 3 | 2 | Hui Yu Koh | Singapore | 2:20.71 | |
| 4 | 3 | Fibriani R Marita | Indonesia | 2:21.00 | |
| 5 | 1 | Chavisa T | Thailand | 2:21.57 | |
| 6 | 5 | Koh Ting Ting | Singapore | 2:25.71 | |
| 7 | 6 | Ressa Ressa | Indonesia | 2:26.34 | |
| 8 | 7 | Erika Kong | Malaysia | 2:28.24 | |

### Preliminary heats

| Rank | Heat/Lane | Swimmer | Nation | Time | Notes |
| - | - | - | - | - | - |
| 1 | H2 L4 | Yi Ting Siow | Malaysia | 2:21.16 | Q |
| 2 | H2 L3 | Koh Ting Ting | Singapore | 2:26.42 | Q |
| 3 | H2 L5 | Fibriani R Marita | Indonesia | 2:26.63 | Q |
| 4 | H1 L3 | Ressa Ressa | Indonesia | 2:27.05 | Q |
| 5 | H2 L6 | Hui Yu Koh | Singapore | 2:27.55 | Q |
| 6 | H1 L6 | Erika Kong | Malaysia | 2:31.01 | Q |
| 6 | H1 L5 | Chavisa T | Thailand | 2:32.17 | Q |
| 8 | H1 L4 | Natthanan Junkrajang | Thailand | 2:32.42 | Q |
