The list of ship decommissionings in 1884 is a chronological list of ships decommissioned in 1884. 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 1884 instead.
| Date | Operator | Ship | Pennant | Class and type | Fate and other notes | Ref |
|---|---|---|---|---|---|---|
| 6 October |  United States Navy | USS Nantucket | Passaic-class monitor | Placed in reserve until recommissioned in 1884 | [1] | |
| Unknown date |  Spanish Navy | Villa de Madrid | Screw frigate | Scrapped 1884 | [2] |