S/S Orion is a steam-powered ship moored on the western shore of the islet Skeppsholmen in central Stockholm, Sweden.

The vessel, which is the oldest of its kind still remaining in Sweden, now serves as a museum ship.

It was a service ship for the Swedish Maritime Administration used for conducting inspections.

S/S Orion served the Trosa - Karlskrona Pilot District between 1929 and 1956, with a home port in Kalmar.

This article about a specific military ship or boat of Sweden is a stub.