The list of ship commissionings in 1898 includes a chronological list of ships commissioned in 1898. In cases where no official commissioning ceremony was held, the date of service entry may be used instead.
| Date | Operator | Ship | Class and type | Notes |
|---|---|---|---|---|
| January 13 | ||||
| April 2 | Torpedo boat | |||
| April 12 | monitor | Recommissioned for Spanish–American War service | ||
| April 15 | ||||
| April 26 | monitor | Recommissioned for Spanish–American War service | ||
| April (unknown date) | ||||
| May 13 | monitor | Recommissioned for Spanish–American War service | ||
| May 16 | monitor | Recommissioned for Spanish–American War service | ||
| May 20 | Collier | Former merchant ship by the same name purchased from J. Graham; commissioned at New York Navy Yard.[1] | ||
| June (unknown date) | Pre-dreadnought battleship | |||
| June (unknown date) | Pre-dreadnought battleship | |||
| July (unknown date) | protected cruiser | |||
| October 7 |