| Event: | Women's 1500m Freestyle |
| Competition: | 2005 FINA World Aquatics Championships |
| Dates: | 25 July (prelims) 26 July (final) |
| Competitors: | 24 |
| Nations: | 19 |
| Win Value: | 16 minutes 00.41 seconds |
| Gold: | Kate Ziegler |
| Goldnoc: | USA |
| Silver: | Flavia Rigamonti |
| Silvernoc: | SUI |
| Bronze: | Brittany Reimer |
| Bronzenoc: | CAN |
| Prev: | 2003 |
| Next: | 2007 |
See main article: Swimming at the 2005 World Aquatics Championships.
The Women's 1500 Freestyle event at the 11th FINA World Aquatics Championships was swum on 25 - 26 July 2005 in Montreal, Quebec, Canada. Preliminary heats were swum during the morning session on 25 July[1] with the top-8 finishers advancing to swim again in the event's final heat during the evening session on 26 July.[2]
At the start of the event, the existing World (WR) and Championships (CR) records were:
| Rank | Heat + Lane | Swimmer | Nation | Time | Notes |
|---|---|---|---|---|---|
| 1 | H3 L2 | Rebecca Cooke | 16:15.69 | q | |
| 2 | H3 L7 | Laura Conway | 16:17.97 | q | |
| 3 | H4 L3 | Flavia Rigamonti | 16:18.14 | q | |
| 4 | H3 L6 | Brittany Reimer | 16:21.55 | q | |
| 5 | H2 L5 | Jana Henke | 16:22.57 | q | |
| 6 | H2 L6 | Yumi Kida | 16:23.05 | q | |
| 7 | H4 L4 | Kate Ziegler | 16:26.75 | q | |
| 8 | H2 L4 | Erika Villaécija | 16:29.54 | q | |
| 9 | H4 L7 | Kristel Köbrich | 16:33.36 | ||
| 10 | H4 L5 | Sarah Paton | 16:37.18 | ||
| 11 | H3 L3 | Lotte Friis | 16:38.53 | ||
| 12 | H3 L4 | Laure Manaudou | 16:39.19 | ||
| 13 | H2 L3 | Éva Risztov | 16:39.55 | ||
| 14 | H3 L5 | Sachiko Yamada | 16:48.23 | ||
| 15 | H4 L2 | Elisa Pasini | 16:48.91 | ||
| 16 | H4 L6 | Réka Nagy | 16:54.94 | ||
| 17 | H3 L1 | Cecilia Biagioli | 17:01.73 | ||
| 18 | H2 L7 | Teresia Gimholt | 17:10.21 | ||
| 19 | H2 L1 | Youn Jeong Seo | 17:14.31 | ||
| 20 | H1 L4 | Shrone Austin | 17:31.81 | ||
| 21 | H4 L8 | Chin-Kuei Yang | 17:34.01 | ||
| 22 | H4 L1 | Wan-Tong Cheng | 17:46.01 | ||
| 23 | H1 L3 | QUAH Ting Wen | 18:07.10 | ||
| 24 | H1 L5 | Wan Ting Goh | 18:16.20 | ||
| Rank | Swimmer | Nation | Time | Notes |
|---|---|---|---|---|
 USA | 16:00.41 | |||
| Switzerland | 16:04.34 | |||
 Canada | 16:07.73 | |||
| 4 | USA | 16:17.17 | ||
| 5 | Germany | 16:17.89 | ||
| 6 |  Spain | 16:17.92 | ||
| 7 |  Great Britain | 16:23.25 | ||
| 8 |  Japan | 16:23.89 | ||