Swimming at the 1964 Summer Olympics – Women's 400 metre individual medley
The women's 400 metre individual medley event at the 1964 Summer Olympics took place on 15–17 October. This swimming event used medley swimming and this was the first time for this event in this distance for the women swimmers. Because an Olympic size swimming pool is 50 metres long, this race consisted of eight lengths of the pool. The first two lengths were swum using the butterfly stroke, the second pair with the backstroke, the third pair of lengths in breaststroke, and the final two were freestyle. Unlike other events using freestyle, swimmers could not use butterfly, backstroke, or breaststroke for the freestyle leg; most swimmers use the front crawl in freestyle events.
|Gold||Donna de Varona|
|1||Anita Lonsbrough||Great Britain||5:30.6|
|2||Sharon Finneran||United States||5:32.7|
|1||Martha Randall||United States||5:27.8|
|6||Margaret Harding||Puerto Rico||6:10.7|
|1||Donna de Varona||United States||5:24.2|
|Donna de Varona||United States||5:18.7||OR|
|Sharon Finneran||United States||5:24.1|
|Martha Randall||United States||5:24.2|
|4||Veronika Holletz||United Team of Germany||5:25.6|
|7||Anita Lonsbrough||Great Britain||5:30.5|
Key: OR = Olympic record
- "Swimming at the 1964 Tokyo Summer Games: Women's 400 metres Individual Medley". Sports Reference. Archived from the original on 17 April 2020. Retrieved 3 November 2016.