List of ship commissionings in 1873
The list of ship commissionings in 1873 includes a chronological list of all ships commissioned in 1873.
| Date | Operator | Ship | Pennant | Class and type | Notes |
| July 17 | Imperial Brazilian Navy | Trajano | Cruiser | ||
| October 1 | Austro-Hungarian Navy | Frundsberg | Corvette | ||
| October 29 | United States Revenue Cutter Service | George S. Boutwell | Revenue cutter | ||
| Unknown | Royal Norwegian Navy | Rap | Torpedo boat |