USS Dacotah (1859) — the only United States Navy ship to be so named — was a large () steam sloop that served the United States Navy in the Atlantic Ocean as well as in Pacific Ocean. When the American Civil War occurred, Dacotah assumed the role of a gunship in the Union blockade of the Confederate States of America. When the war was over, Dacotah — who was named for the American Dakota tribe — resumed her role protecting American interests worldwide by showing her presence in both the Atlantic and Pacific Oceans.