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

The Women's 4x100 Freestyle Relay swimming event at the 2009 SEA Games was held on December 11, 2009. Of note, in the event's final, the top-3 teams all swam faster than the then-Games Record in the event.

## Results

### Final

| Place | Lane | Nation | Swimmers | Time | Notes |
| - | - | - | - | - | - |
| 1 | 4 | Singapore | Lynette Lim Amanda Lim Mylene Ong Quah Ting Wen | 3:45.73 | GR |
| 2 | 7 | Thailand | | 3:48.09 | |
| 3 | 5 | Malaysia | | 3:51.40 | |
| 4 | 6 | Philippines | | 3:56.20 | |
| 5 | 3 | Indonesia | | 3:59.75 | |
| 6 | 2 | Laos | | 5:12.91 | |
