Orion is the name of various ships and a ship class:
Naval
- BAE Orion, Ecuadorian Navy ship, originally
- , Royal French Navy ship of the line
- , a Nazi German auxiliary cruiser
- , Royal Australian Navy submarine
- , various British Royal Navy ships
- , British Royal Navy battleship class
- , Royal Swedish Navy ships
- , various US Navy ships
Civilian
- , an Arctic ice-strengthened cargo ship
- (also known as MS Orion, MY Orion), a National Geographic exploration ship
- MV Orion, a Greek ro-ro freight ferry, previously Pentland Ferries' Orcadia and Caledonian MacBrayne's Saturn
- Orion, a heavy lift vessel (HLV) operated by DEME Offshore, a subsidiary of the DEME Group.
- Orion (1904 ship)
- , a British ferry which sank in 1850
- , an Orient Steam Navigation modified
- , a Swedish salvage ship and museum ship
- , renamed Orion by 1919
References