The Women's 800 Freestyle swimming event at the 25th SEA Games was held on December 12, 2009.

Results The women's 800 Free at was swum as a timed final event, meaning that each swimmer only swam the race once and all times were aggregated together for final placing. Place Heat/Lane Swimmer Nation Time Notes H2 L4 Lynette Lim 8:35.41 GR H2 L5 Khoo Cai Lin 8:45.36 H2 L6 Rutai Santadvatana 8:50.50 4 H2 L3 Erica Rotten 8:54.96 5 H1 L4 Hui Yu Koh 9:04.67 6 H2 L2 Wei Li Lai 9:09.16 7 H2 L7 Patarawadee K 9:08.58 8 H1 L5 Raina Saumi 9:15.65 9 H1 L3 Jasmine Ong 9:50.63 Source:

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