USS Grampus may refer to:

See also

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  • CSS Grampus, a Confederate States Navy steamer
  • HMS Grampus, ships of the British Royal Navy
  • USFC Grampus, a fisheries research and fish-culture ship in commission with the United States Commission on Fish and Fisheries from 1886 to 1903 and as USFS Grampus with the United States Bureau of Fisheries from 1903 to 1917