at the Games of the XIV Olympiad
|Dates||30 July – 7 August|
|No. of events||11|
|Competitors||249 from 34 nations|
| Swimming at the|
1948 Summer Olympics
At the 1948 Summer Olympics in London, 11 swimming events were contested, six for men and five for women. All swimming events took place at the Empire Pool. There was a total of 249 participants from 34 countries competing.
|1||United States (USA)||8||6||1||15|
|7||Great Britain (GBR)||0||0||1||1|
|Totals (7 nations)||11||11||11||33|
|100 m freestyle|| Wally Ris |
|57.3 (OR)|| Alan Ford |
|57.8|| Géza Kádas |
|400 m freestyle|| Bill Smith |
|4:41.0 (OR)|| Jimmy McLane |
|4:43.4|| John Marshall |
|1500 m freestyle|| Jimmy McLane |
|19:18.5|| John Marshall |
|19:31.3|| György Mitró |
|100 m backstroke|| Allen Stack |
|1:06.4|| Bob Cowell |
|1:06.5|| Georges Vallerey |
|200 m breaststroke|| Joe Verdeur |
|2:39.3 (OR)|| Keith Carter |
|2:40.2|| Bob Sohl |
|4 × 200 metre freestyle relay|| United States (USA)|
|8:46.0 (WR)|| Hungary (HUN)|
|8:48.4|| France (FRA)|
Henri Padou, Jr.
|100 m freestyle|| Greta Andersen |
|1:06.3|| Ann Curtis |
|1:06.5|| Marie-Louise Linssen-Vaessen |
|400 m freestyle|| Ann Curtis |
|5:17.8 (OR)|| Karen Harup |
|5:21.2|| Catherine Gibson |
|100 m backstroke|| Karen Harup |
|1:14.4 (OR)|| Suzanne Zimmerman |
|1:16.0|| Judy-Joy Davies |
|200 m breaststroke|| Nel van Vliet |
|2:57.2|| Nancy Lyons |
|2:57.7|| Éva Novák |
|4 × 100 metre freestyle relay|| United States (USA)|
|4:29.2 (OR)|| Denmark (DEN)|
|4:29.6|| Netherlands (NED)|
249 swimmers from 34 nations competed.
Some of the Olympic medalists in London:
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