| • | William D. Leahy | December 15, 1944, |
| • | Ernest King | December 17, 1944, |
| • | Chester W. Nimitz | December 19, 1944, |
| • | William F. Halsey | December 11, 1945. |
The insignia for Fleet Admiral comprises five stars in a pentagon design with a thick rank stripe, below four smaller stripes, on the service dress blue uniform.
A close contender for the rank of Fleet Admiral was Raymond A. Spruance; however, U.S. Representative Carl Vinson, a strong supporter of William F. Halsey, was reported to have on several occasions blocked the final promotion of Spruance to Fleet Admiral.
Since the close of the Second World War, there have been no additional Fleet Admirals appointed in the United States Navy. However, the rank still remains listed on official U.S. rank insignia precedence charts and could be reestablished at the discretion of the United States Congress. Some Navy documents, especially those teaching new sailors the rank structure, have stated that the rank officially expired upon the death of Fleet Admiral Nimitz in 1966. Its reenactment would require another act of Congress.
U.S. Naval tradition holds that the rank Admiral of the Navy is considered senior to that of Fleet Admiral. The only person ever to hold the rank of Admiral of the Navy was George Dewey. Dewey was awarded the rank after his service in the Spanish-American War. A successor rank to Admiral of the Navy, to be known as Flag Admiral, was briefly discussed (but never approved) in 1945 as a rank senior to Fleet Admiral.
All five star officers are, technically, unable to retire from active duty. This is more of a convention of honor than a practical matter, as five star officers continue to be paid full salary for life, unless (as Dwight D. Eisenhower did upon his election to the Presidency) they formally resign their commission. President Eisenhower's commission was retroactively reinstated back to 1944 by an Executive Order of President John F. Kennedy after President Eisenhower left office.