| 5th European Aquatics Championships | |
| Host City: | London |
| Country: | United Kingdom |
| Events: | 16 |
| Previous: | Madenburg 1934 |
The 1938 LEN European Aquatics Championships were held 6–13 August 1938 in London, United Kingdom.
| 3 m springboard | Erhard Weiß | 148.02 | Fritz Haster | 137.50 | Frederick Hodges | 132.52 | |
| 10 m highboard | Erhard Weiß | 124.67 | Hans Kitzig | 121.53 | László Hidvégi | 107.22 |
| 3 m springboard | Betty Slade | 103.60 | Gerda Daumerlang | 102.28 | Edna Child | 100.40 | |
| 10 m highboard | Inge Beeken | 37.09 | Ann-Margret Nirling | 36.92 | Suse Heinze | 36.39 |
| 100 m freestyle | Kees Hoving | 59.8 | Frederick Dove | 1:00.6 | István Kőrösi | 1:01.2 | |
| 400 m freestyle | Björn Borg | 4:51.6 | Werner Plath | 4:56.2 | Norman Wainwright | 4:56.3 | |
| 1500 m freestyle | Björn Borg | 19:55.6 | Bob Leivers | 19:57.0 | Heinz Arendt | 20:12.6 | |
| 100 m backstroke | Heinz Schlauch | 1:09.0 | Gerhard Nüsske | 1:10.8 | Árpád Lengyel Stans Scheffer | 1:12.0 | |
| 200 m breaststroke | Joachim Balke | 2:45.8 | Erwin Sietas | 2:45.9 | Anton Cerer | 2:47.6 | |
| 4×200 m freestyle relay | Werner Birr Wolfgang Heimlich Hans Freese Werner Plath | 9:17.6 | Roland Pallard Christian Talli René Cavalero Alfred Nakache | 9:22.6 | Frederick Dove Kenneth Deane Bob Leivers Norman Wainwright | 9:24.6 |
| 100 m freestyle | Ragnhild Hveger | 1:06.2 | Birte Ove-Petersen | 1:06.8 | Rie van Veen | 1:08.4 | |
| 400 m freestyle | Ragnhild Hveger | 5:09.0 | Rie van Veen | 5:27.7 | Fernande Caroen | 5:33.4 | |
| 100 m backstroke | Cor Kint | 1:15.0 | Iet van Feggelen | 1:15.9 | Birte Ove-Petersen | 1:17.0 | |
| 200 m breaststroke | Inge Sørensen | 3:05.4 | Doris Storey | 3:06.0 | Jopie Waalberg | 3:06.2 | |
| 4×100 m freestyle relay | Eva Arndt Riise Gunvor Kraft Birte Ove-Petersen Ragnhild Hveger | 4:31.6 | Alie Stijl Trude Malcorps Rie van Veen Willy den Ouden | 4:39.5 | Zilpha Grant Joyce Harrowby Margery Hinton Olive Wadham | 4:51.4 |
| Men's tournament |