The Isle of Man Steam Packet Company Limited is the oldest continuously operating passenger shipping company in the world, having been founded in 1830.

The Isle of Man Sea Terminal is the arrival and departure point for all passenger and car ferries operating to and from the Isle of Man, and is located in Douglas, the island's capital. It is one of the two main gateways to the Isle of Man, the other one being the Isle of Man Airport. It is operated by and is the main hub for the Isle of Man Steam Packet Company, which runs year-round sailings to Heysham, and seasonal sailings to Liverpool, Belfast and Dublin in the summer and Birkenhead at weekends in the winter.