Grand admiral
Grand admiral is a historic naval rank, the highest rank in the several European navies that used it. It is best known for its use in Germany as Großadmiral. A comparable rank in modern navies is that of admiral of the fleet.
Grand admirals in individual navies
Austria-Hungary
The Austrian grand admirals were all members of the Imperial family, except for Anton Haus, the commander of the Austro-Hungarian Navy for part of World War I:| Portrait | Name | Appointed | |
| Anton Haus | 12 May 1916 | ||
| Kaiser Charles I of Austria | 1 November 1916 | ||
| Kaiser Wilhelm II of Germany | 22 February 1917 |
France
In Bourbon Restoration France, the rank was an honorific one equivalent to that of marshal in the French Army.Germany
In the Imperial German Navy, and later in the Kriegsmarine, the rank Großadmiral was the equivalent of a British admiral of the fleet or a United States fleet admiral; as a five-star rank. Its holders were authorised to carry a baton.The rank was created in 1901 and discontinued in 1945, by which time a total of eight men had been promoted to it. The next most junior rank was General admiral.
Imperial Germany
Before and during World War I, the following were made grand admirals of the Imperial German Navy :| Portrait | Name | Appointed | |
| King Edward VII of the United Kingdom | 26 June 1902 | ||
| Hans von Koester | 28 June 1905 | ||
| King Oscar II of Sweden | 13 July 1905 | ||
| Prince Henry of Prussia | 4 September 1909 | ||
| Alfred von Tirpitz | 27 January 1911 | ||
| Henning von Holtzendorff | 31 July 1918 |
Nazi Germany
Großadmiral was the most senior rank of the Kriegsmarine, immediately senior to General admiral#Nazi Germany. The rank was reintroduced in 1939 and held only by the Commander-in-Chief of the Kriegsmarine.| Portrait | Name | Appointed | |
| Erich Raeder | 1 April 1939 | ||
| Karl Dönitz | 30 January 1943 |