List of ship decommissionings in 1917
The list of ship decommissionings in 1917 includes a chronological list of ships decommissioned in 1917. In cases where no official decommissioning ceremony was held, the date of withdrawal from service may be used instead. For ships lost at sea, see list of shipwrecks in 1917 instead.
| Date | Operator | Ship | Pennant | Class and type | Fate and other notes |
| April | Originally Chilean. Converted to a barracks ship | ||||
| May 10. | Protected cruiser | Used as a quarantine hospital during Spanish flu pandemic |