List of ship decommissionings in 1920
# List of ship decommissionings in 1920

The list of ship decommissionings in 1920 includes a chronological list of all ships decommissioned in 1920.

| | Operator | Ship | Class and type | Fate | Other notes |
| - | - | - | - | - | - |
| 7 May | United States Navy | Alabama | Illinois-class battleship | Target ship | |
| 10 May | United States Navy | Kearsarge | Kearsarge-class battleship | Conversion to a crane ship, became Crane Ship 1 (AB-1) | Scrapped in 1955 |
| 15 May | United States Navy | Wisconsin | Illinois-class battleship | Sold for scrap in 1924 | |
| 29 May | United States Navy | Kentucky | Kearsarge-class battleship | Sold for scrap 1924 | |
| 30 September | Royal Australian Navy | Encounter | Second class protected cruiser | Converted to an accommodation ship | |
| October | Imperial German Navy | Roon | Armored cruiser | Scrapped | |
