Swimming at the 2009 Southeast Asian Games – Women's 4 × 100 metre medley relay
# Swimming at the 2009 Southeast Asian Games – Women's 4 × 100 metre medley relay

The Women's 4x100 Medley Relay swimming event at the 2009 SEA Games was held on December 13, 2009.

## Results

### Final

| Place | Lane | Nation | Swimmers | Time | Notes |
| - | - | - | - | - | - |
| 1 | 4 | Singapore | Roanne Ho Shana Lim Quah Ting Wen Tao Li | 4:10.38 | GR |
| 2 | | Malaysia | | 4:13.18 | |
| 3 | | Thailand | Chavisa Thaveesupsoonthorn Phiangkhwan Pawapotako Natnapa Prommuenwai Natthanan Junkrajang | 4:19.89 | |

Note: Results appear to be incomplete (i.e. there were most likely more than 3 teams in the final).

