The list of ship commissionings in 1863 is a chronological list of ships commissioned in 1863. In cases where no official commissioning ceremony was held, the date of service entry may be used instead.
| Date | Operator | Ship | Pennant | Class and type | Fate and other notes | Ref |
|---|---|---|---|---|---|---|
| 7 January | USS Patapsco | – | Passaic-class monitor | [1] | ||
| 18 January | USS Weehawken | – | Passaic-class monitor | [2] | ||
| 9 February | USS Sangamon | – | Passaic-class monitor | [3] | ||
| 24 February | USS Catskill | – | Passaic-class monitor | [4] | ||
| 26 February | USS Nantucket | – | Passaic-class monitor | [5] | ||
| 12 November | Villa de Madrid | – | Screw frigate | Scrapped 1884 | [6] |