This is a list of the world's ship operating companies listed alphabetically by continent and country. This list includes companies both operating now and in the past.
- New Zealand
- The Interislander
- The Lynx
- Denmark
- Scandlines
- Estonia
- Estline
- Tallink
- Finland
- Eckerö Line
- Eckerö Linjen
- Finnlines
- Nordic Jet Line
- RG Line
- Seawind Line
- Silja Line
- Viking Line
- Ålandstrafiken
- Germany
- Elbe Ferries
- Euroseabridge
- TT-Line
- Greece
- Anek Lines
- Superfast Ferries
- Ireland
- Irish Ferries
- Italy
- Grimaldi
- Latvia
- Rīgas Jūras Līnija
- Norway
- Color Line
- Poland
- Unity Line
- Sweden
- Birka Cruises
- Destination Gotland
- Nordö Link
- Sea Cat
- Stena Line
- Ånedin Linjen
