List of ship decommissionings in 1919
The list of ship decommissionings in 1919 includes a chronological list of ships decommissioned in 1919. In cases where no official commissioning ceremony was held, the date of service entry may be used instead. For ships lost at sea, see list of shipwrecks in 1919 instead.
| Date | Operator | Ship | Pennant | Class and type | Fate and other notes |
| January 2 | ' | SP-1086 | Section patrol craft | Returned to pre-World War I owner | |
| January 17 | ' | SP-599 | Section patrol craft | Sold | |
| January 21 | ' | Converted merchant-type auxiliary hulk | Surrendered to the United Kingdom; became SS Akenside | ||
| January 29 | ' | SP-317 | Section patrol craft | Returned to pre-World War I owner and scrapped in 1938 | |
| January | ' | SP-752 | Section patrol craft | Returned to pre-World War I civilian owner | |
| February 27 | ' | SP-1045 | Section patrol craft | Returned to pre-World War I civilian owner | |
| March 12 | ' | SP-693 | Section patrol craft/minesweeper | Returned to pre-World War I owner | |
| March 27 | ' | SP-451 | Section patrol craft | transferred to United States Coast and Geodetic Survey until sold in 1927 | |
| March 28 | ' | SP-268 | Section patrol craft | Transferred to United States Coast and Geodetic Survey until returned to United States Navy and sold 1920 | |
| March 31 | ' | BB-4 | Battleship | Used as a target ship | |
| April 28 | ' | SP-206 | Section patrol craft | Returned to pre-World War I owner until returned to service as 1942–1943 | |
| May 5 | ' | SP-593 | Section patrol craft | Sold 1920; Burned and sank 1927 | |
| May 7 | ' | SP-182 | Section patrol craft | Sold | |
| May 7 | ' | SP-40 | Section patrol craft | Sold | |
| May 12 | ' | SP-577 | Section patrol craft | Sold | |
| May 17 | ' | SP-729 | Section patrol craft | Transferred to United States Coast Guard | |
| July 2 | ' | SP-135 | Section patrol craft | Returned to pre-World War I owner | |
| July 8 | ' | SP-516 | Section patrol craft | Returned to pre-World War I civilian owner | |
| August 2 | ' | SP-218 | Section patrol craft | Sank 1920 | |
| August 12 | ' | SP-460 | Section patrol craft | Sold | |
| August 18 | ' | SP-765 | Section patrol craft | Sold | |
| September 8 | ' | SP-530 | Section patrol craft/minesweeper | Returned to pre-World War I owner | |
| September | ' | SP-453 | Section patrol craft | Sold | |
| November 5 | ' | light cruiser | Stricken and surrendered to the United Kingdom as Prize S in 1920 | ||
| December 12 | A-2 | Submarine Torpedo Boat No. 3 | ex-Adder; used as a target from 1920 and stricken in 1922 | ||
| December 12 | A-4 | Submarine Torpedo Boat No. 5 | ex-Moccasin; used as a target ship and stricken in 1922 | ||
| December 12 | A-6 | Submarine Torpedo Boat No. 7 | ex-Porpoise; used as a target ship and stricken in 1922 | ||
| December 12 | A-7 | Submarine Torpedo Boat No. 8 | ex-Shark; used as a target ship in 1921 and stricken in 1922 | ||
| December 18 | ' | FS3 | Converted merchant type seaplane carrier | Surrendered to the United Kingdom; became SS Eian Maru | |
| unknown date | ' | SP-1793 | Section patrol craft | Returned to pre-World War I owner until scrapped 1935 | |
| unknown date | ' | SP-751 | Section patrol craft | Returned to pre-World War I owner | |
| unknown date | ' | SP-1003 | Section patrol craft | Returned to pre-World War I owner | |
| unknown date | ' | SP-586 | Section patrol craft | Sold | |
| unknown date | ' | SP-4555 | Section patrol craft | Returned to pre-World War I owner | |
| unknown date | ' | FS1 | Converted merchant type seaplane carrier | Surrendered to the United Kingdom; became SS Vulcan City | |
| unknown date | ' | FS2 | Converted merchant type seaplane carrier | Surrendered to the United States; became SS Santa Elena |