USS Marathon may refer to the following ships of the United States Navy:
- USS Marathon (APA-200), was an attack transport commissioned 28 October 1944
- USS Marathon (PGM-89), was a patrol craft commissioned 11 May 1968
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.