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The Women's 200 Freestyle swimming event at the 25th SEA Games was held on December 13, 2009.

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Place	Lane	Swimmer	Nation	Time	Notes
1	4	Quah Ting Wen	Singapore	2:00.57	GR
2	5	Natthanan Junkrajang	Thailand	2:01.65
3	6	Rutai Santadvatana	Thailand	2:03.90
4	3	Erica Totten	Philippines	2:03.97
5	7	Amanda Lim	Singapore	2:04.09
6	8	Wei Li Lai	Malaysia	2:06.36
7	2	Heidi Gan	Malaysia	2:07.79
8	1	Tam Nguyen Tran	Vietnam	2:08.51

Rank	Heat/Lane	Swimmer	Nation	Time	Notes
1	H2 L4	Quah Ting Wen	Singapore	2:05.90	Q
2	H1 L4	Natthanan Junkrajang	Thailand	2:07.48	Q
3	H1 L3	Erica Totten	Philippines	2:08.20	Q
4	H1 L5	Rutai Santadvatana	Thailand	2:08.26	Q
5	H2 L3	Heidi Gan	Malaysia	2:08.36	Q
6	H2 L5	Amanda Lim	Singapore	2:09.12	Q
7	H1 L2	Tam Nguyen Tran	Vietnam	2:09.19	Q
8	H2 L6	Wei Li Lai	Malaysia	2:09.33	Q
9	H2 L2	Fibriani R Marita	Indonesia	2:11.97
10	H1 L6	Enny Susilowati M	Indonesia	2:12.57