USS Chicago (CA-29) was a Northampton-class heavy cruiser of the United States Navy that served in the Pacific Theater in the early years of World War II. She was the second US Navy ship to be named after the city of Chicago, Illinois. After surviving a midget submarine attack at Sydney Harbour and serving in battle at the Coral Sea and Savo Island in 1942, she was sunk by Japanese aerial torpedoes in the Battle of Rennell Island, in the Solomon Islands, on 30 January 1943.
After a shakedown cruise to Honolulu, Tahiti and American Samoa, Chicago departed Mare Island on 27 July 1931 and sailed to the east coast, arriving at Fort Pond Bay, New York, on 16 August. There, she became flagship of Commander, Cruisers, Scouting Force, and operated with that force until 1940.
In February 1932, Chicago conducted gunnery exercises with other ships of the Scouting Force preliminary to Fleet Problem XIII off the California coast. The Fleet was based on the West Coast thereafter and, until 1934, operated in the Pacific, from Alaska to the Panama Canal Zone and the Hawaiian Islands. In 1934, the annual fleet exercises were held in the Caribbean, followed in May 1934 by the Presidential Fleet Review in New York Harbor. The Scouting Force operated along the east coast and in the Caribbean until October and then returned to base at San Pedro, California. Chicago was one of six ships to receive the new RCA CXAM RADAR in 1940. Chicago continued to operate out of San Pedro until 29 September 1940, when she sailed to Pearl Harbor.
During the next 14 months, Chicago operated out of Pearl Harbor, exercising with various task forces to develop tactics and cruising formations, and cruising to Australia and to the west coast.