The Women's 4x200 Freestyle Relay swimming event at the 2009 SEA Games was held in December 2009.
Results edit
Final edit
| Place | Lane | Nation | Swimmers | Time | Notes |
|---|---|---|---|---|---|
| 1 |  Singapore |
Lynette Lim Amanda Lim Mylene Ong Quah Ting Wen |
8:11.75 | GR | |
| 2 |  Thailand |
Benjaporn Sriphanomtorn Rutai Santadvatana Jiratida Phinyosophon Natthanan Junkrajang |
8:18.00 | ||
| 3 |  Malaysia |
8:29.12 |
Note: Results appear to be incomplete (i.e. there were most likely more than 3 teams in the final).