List of Knight's Cross of the Iron Cross recipients of the U-boat service

The Knight's Cross of the Iron Cross (German: Ritterkreuz des Eisernen Kreuzes) and its variants was the highest military award in Nazi Germany. Recipients are grouped by grades of the Knight's Cross. During or shortly after World War II, 145 German sailors and officers of the U-boat service as part of the Kriegsmarine received the Knight's Cross of the Iron Cross. Among them, 29 officers received the Knight's Cross of the Iron Cross with Oak Leaves (Ritterkreuz des Eisernen Kreuzes mit Eichenlaub), five the Knight's Cross of the Iron Cross with Oak Leaves and Swords (Ritterkreuz des Eisernen Kreuzes mit Eichenlaub und Schwertern), and two won the Knight's Cross of the Iron Cross with Oak Leaves Swords and Diamonds (Ritterkreuz des Eisernen Kreuzes mit Eichenlaub, Schwertern und Brillanten). Of these, 144 presentations were formally made and one recipient received the award after 11 May 1945, when Großadmiral Karl Dönitz ordered a cease of all promotions and illegalized all subsequent awards. The final recipient is therefore considered to have received the medal without legal authority.^[1][2]