The list of ship decommissionings in 1864 includes a chronological list of ships decommissioned in 1864. 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 1864 instead.
| Date | Operator | Ship | Pennant | Class and type | Fate and other notes |
|---|---|---|---|---|---|
| May | | Aaron V. Brown | revenue cutter | sold [1] | |
| unknown date | Aarøsund | gunboat | [2] | ||
| unknown date | Othon | steamship |
she served in the shoals of those dangerous and bitterly contested waters until May 1864 when she proceeded to New York harbor to be sold.