SMS Mars may refer to one of two ships in the German and Austro-Hungarian Navies:
- SMS Mars (1879), a German gunnery training ship in the 19th century
- SMS Tegetthoff (1878), an Austro-Hungarian central battery ship, renamed Mars in 1912
This article includes a list of ships with the same or similar names. If an internal link for a specific ship led you here, you may wish to change the link to point directly to the intended ship article, if one exists.