USS Mars may refer to:
- USS Mars (1798), was a galley built in 1798 and renamed Charleston while under construction
- USS Mars (AC-6), was launched 10 April 1909 and sold 22 June 1923
- USS Mars AR-16, was laid down 16 May 1945 but construction was canceled 12 August 1945
- USS Mars (AFS-1), was launched 15 June 1963 and decommissioned 1 February 1993
|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.|
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