M-S Sobieski was a Polish passenger ship built for the Polish Ocena Lines to replace the aging SS Kościuszko and SS Pulaski; a sister ship to the MS Chrobry. She was named in honour of the Polish king Jan III Sobieski. The ship was used as a troopship in Operation Ariel and the Battle of Dakar.
Builders of the MS Sobieski are Swan, Hunter and Wallsend.