USS Merak may refer to the following ships of the United States Navy:
- USS Merak (1910), was built in 1910 at Rotterdam, the Netherlands and operated by an Austrian-controlled company. The vessel was seized and turned over to the US Navy in 1918 and was sunk, with no casualties, in the western Atlantic 6 August 1918 by gunfire from the German U-boat SM U-140.
- USS Merak (AF-21), was a cargo ship acquired by the US Navy on 20 March 1942 and decommissioned 21 June 1946
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.