Swimming at the 2008 Summer Olympics – Women's 800 metre freestyle Heats Heats

| Heat | Lane | Name_ | Nationality | Time_ |
|---|---|---|---|---|
| 4 | 4 | Rebecca Adlington | Great Britain | 8:18.06 |
| 3 | 5 | Camelia Potec | Romania | 8:19.70 |
| 4 | 2 | Lotte Friis | Denmark | 8:21.74 |
| 5 | 5 | Alessia Filippi | Italy | 8:21.95 |
| 4 | 3 | Kylie Palmer | Australia | 8:22.81 |
| 5 | 1 | Yelena Sokolova | Russia | 8:23.07 |
| 3 | 6 | Li Xuanxu | China | 8:24.37 |
| 5 | 7 | Cassandra Patten | Great Britain | 8:25.91 |
| 4 | 1 | Wendy Trott | South Africa | 8:26.21 |
| 5 | 4 | Kate Ziegler | United States | 8:26.98 |
| 3 | 4 | Katie Hoff | United States | 8:27.78 |
| 5 | 6 | Coralie Balmy | France | 8:28.34 |
| 3 | 3 | Flavia Rigamonti | Switzerland | 8:28.67 |
| 3 | 8 | Andreina Pinto | Venezuela | 8:30.30 |
| 4 | 7 | You Meihong | China | 8:31.11 |