| Host city | Paris |
|---|---|
| Country | France |
| Events | 16 |
| Opening | 23 August 1931 |
| Closing | 30 August 1931 |
The 1931 LEN European Aquatics Championships were held from 23 to 30 August in Paris, France.
* Host nation (France)
| Rank | Nation | Gold | Silver | Bronze | Total |
|---|---|---|---|---|---|
| 1 |  Hungary | 5 | 2 | 2 | 9 |
| 2 |  Germany | 3 | 4 | 4 | 11 |
| 3 |  Netherlands | 3 | 2 | 0 | 5 |
| 4 |  Austria | 2 | 1 | 1 | 4 |
| 5 |  Great Britain | 1 | 3 | 3 | 7 |
| 6 |  France* | 1 | 2 | 2 | 5 |
| 7 |  Finland | 1 | 0 | 0 | 1 |
| 8 |  Italy | 0 | 1 | 3 | 4 |
| 9 |  Sweden | 0 | 1 | 0 | 1 |
| 10 |  Czechoslovakia | 0 | 0 | 1 | 1 |
| Totals (10 entries) | 16 | 16 | 16 | 48 | |
| Event | Gold | Silver | Bronze | |||
|---|---|---|---|---|---|---|
| 3 m springboard | Ewald Riebschläger Germany | 136.22 | Maurice Lepage France | 135.32 | Willi Neumann Germany | 134.38 |
| Platform | Josef Staudinger Austria | 111.82 | Willi Neumann Germany | 108.90 | Ewald Riebschläger Germany | 107.96 |
| Event | Gold | Silver | Bronze | |||
|---|---|---|---|---|---|---|
| 3 m springboard | Olga Jordan Germany | 77.00 | Madi Epply Austria | 72.86 | ? Schlüter Germany | 69.?? |
| Platform | Madi Epply Austria | 34.28 | Ingeborg Sjöqvist Sweden | 33.62 | R Cretté-Flavier France | 32.94 |
| Event | Gold | Silver | Bronze | |||
|---|---|---|---|---|---|---|
| 100 m freestyle | István Bárány Hungary | 59.8 | András Székely Hungary | 1:00.8 | Pavel Steiner Czechoslovakia | 1:03.0 |
| 400 m freestyle | István Bárány Hungary | 5:04.0 | Jean Taris France | 5:04.2 | Paolo Costoli Italy | 5:16.8 |
| 1500 m freestyle | Olivér Halassy Hungary | 20:49.0 | Giuseppe Perentin Italy | 20:50.6 | Paolo Costoli Italy | 21:09.4 |
| 100 m backstroke | Gerhard Deutsch Germany | 1:14.8 | Aladár Bitskey Hungary | 1:15.8 | Károly Nagy Hungary | 1:16.2 |
| 200 m breaststroke | Ivo Reingoldt Finland | 2:52.2 | Karl Wittenberg Germany | 2:54.4 | Erwin Sietas Germany | 2:55.0 |
| 4×200 m freestyle relay | Hungary András Wanié László Szabados András Székely István Bárány | 9:34.0 WR | Germany Karl Schubert Raimund Deiters Hans Balk Herbert Heinrich | 9:48.6 | Italy Antonio Conelli Sirio Bianchelli Ettore Baldo Paolo Costoli | 9:49.0 |
| Event | Gold | Silver | Bronze | |||
|---|---|---|---|---|---|---|
| 100 m freestyle | Yvonne Godard France | 1:10.0 | Willy den Ouden Netherlands | 1:11.8 | Joyce Cooper Great Britain | 1:12.0 |
| 400 m freestyle | Marie Braun Netherlands | 5:42.0 | Joyce Cooper Great Britain | 5:54.0 | Yvonne Godard France | 5:55.4 |
| 100 m backstroke | Marie Braun Netherlands | 1:22.8 | Joyce Cooper Great Britain | 1:23.6 | Phyllis Harding Great Britain | 1:24.8 |
| 200 m breaststroke | Cecelia Wolstenholme Great Britain | 3:16.4 | Jenny Kastein Netherlands | 3:18.2 | Margery Hinton Great Britain | 3:20.4 |
| 4×100 m freestyle relay | Netherlands Truus Baumeister Maria Vierdag Willy den Ouden Marie Braun | 4:55.0 | Great Britain Valerie Davies Phyllis Harding Jean McDowell Joyce Cooper | 5:00.8 | Hungary Margit Mallasz Ilona Tóth Margit Sipos Magda Lenkei | 5:02.2 |
Legend:WR – World record
| Event | Gold | Silver | Bronze |
|---|---|---|---|
| Men's tournament | Hungary | Germany | Austria |