USS Cincinnati (CL-6), a light cruiser of the United States Navy, was the third ship of the four-stack Omaha-class. She was the third Navy ship named for the city of Cincinnati, Ohio.
Cincinnati was built by Todd Dry Dock and Construction Co., Tacoma, Wash., where her keel was laid on 15 May 1920; Launched on 23 May 1921 by Seattle Construction Drydock Co., Seattle, Wash., the cruiser was christened by Mrs. Charles E. Tudor, wife of the Director of Safety of Cincinnati, Ohio, having been designated by the Honorable John Galvin, Mayor of Cincinnati; and commissioned 1 January 1924, Captain Charles P. Nelson in command.
After a shakedown cruise off South America, Cincinnati joined the Scouting Fleet in June 1924, for operations along the Atlantic coast and in the Caribbean. With this force, she joined in fleet maneuvers in the Pacific and off the Panama Canal Zone in spring 1925, then resumed Atlantic and Caribbean operations until early in 1927.
On 17 February 1927, Cincinnati sailed from Balboa, C.Z., for duty in the Far East, based at Shanghai until October, then at Manila, and again at Shanghai from February-April 1928. On the long cruise home to the east coast, she joined in exercises off Oahu and, carried men from Honolulu to Corinto, Nicaragua, returning to Newport, R.I. on 25 July, for operations on the east coast until 1932.
Early in 1932, she joined the Battle Force, US Fleet, in the Pacific, taking part in the Fleet's cruise to the east coast from April-July 1934 for the Presidential Review of 31 May at New York. Returning to the west coast, she operated on summer training cruises for naval reservists from 1935 to 1938, then was reassigned to Atlantic duty during 1939.