The list of ship decommissionings in 1898 includes a chronological list of all ships decommissioned in 1898.
| Date | Operator | Ship | Pennant | Class and type | Fate and other notes |
|---|---|---|---|---|---|
| September | 
United States Navy
|
Nahant | Passaic-class monitor | Sold for scrap on 6 April 1904 | |
| September 11 |
United States Navy
|
Passaic | Passaic-class monitor | Sold for scrap on 10 October 1899 | |
| September 22 |
United States Navy
|
Catskill | Passaic-class monitor | Sold for scrap on 4 December 1901 |