The second USS South Dakota (ACR-9), also referred to "Armored Cruiser No. 9", and later renamed Huron (CA-9), was a United States Navy Pennsylvania-class armored cruiser.
She was launched on 21 July 1904 by the Union Iron Works, San Francisco, California, sponsored by Grace Herreid (daughter of Charles N. Herreid, Governor of South Dakota), and commissioned on 27 January 1908, Captain James T. Smith in command.