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: