USS Chicago (SSN-721) is a Los Angeles-class submarine, the fourth ship of the United States Navy to be named for the city of Chicago, Illinois. The contract to build her was awarded to Newport News Shipbuilding and Dry Dock Company in Newport News, Virginia on 13 August 1981 and her keel was laid down on 5 January 1983. She was launched on 13 October 1984 sponsored by Mrs. Vicki Ann Paisley, wife of Melvyn R. Paisley assistant Secretary of the Navy, and commissioned on 27 September 1986. The Chicago was retired in 2023.
U.S. Navy Lt. Scotty Murphy, assigned to the attack submarine USS Chicago (SSN 721), reunites with his family at Apra Harbor, Guam, April 25, 2013 130425-N-LS794-354
U.S. Navy Electrician's Mate 2nd Class Huston Roof, assigned to the attack submarine USS Chicago (SSN 721), reunites with his family at Apra Harbor, Guam, April 25, 2013 130425-N-LS794-423
SSN-721 Crest
U.S. Sailors assigned to the attack submarine USS Chicago (SSN 721) wait as the Chicago returns to Apra Harbor, Guam, April 25, 2013 after completing its first mission as part of Commander, Submarine Squadron 130425-N-LS794-070
U.S. Navy Chief Machinist's Mate Alan Engle, left, assigned to the attack submarine USS Chicago (SSN 721), greets his family after the submarine returns to Apra Harbor, Guam, April 25, 2013, after completing its 130425-N-LS794-301
The attack submarine USS Chicago (SSN 721) returns to Apra Harbor, Guam, April 25, 2013, after completing its first mission as part of Commander, Submarine Squadron 15 130425-N-LS794-035
USS Chicago (SSN-721) and USS Fletcher (DD-992)
U.S. Navy Cmdr. Nick Tilbrook, center, the commanding officer of the attack submarine USS Chicago (SSN 721), watches mooring operations from the bridge as the submarine returns to Apra Harbor, Guam, April 25 130425-N-LS794-165
The attack submarine USS Chicago (SSN 721) returns to Apra Harbor, Guam, April 25, 2013, after completing its first mission as part of Commander, Submarine Squadron 15 130425-N-LS794-249
Edward J. Campbell, president of Newport News Shipbuilidng and Dry Dock Company, speaks during the launching of the Los Angeles class nuclear-powered attack submarine USS CHICAGO (S - DPLA - fd366474a4b54057e7be11e954921c89