USS Olympia (C-6/CA-15/CL-15/IX-40) is a protected cruiser that saw service in the United States Navy from her commissioning in 1895 until 1922. This vessel became famous as the flagship of Commodore George Dewey at the Battle of Manila Bay during the Spanish-American War in 1898. The ship was decommissioned after returning to the U.S. in 1899, but was returned to active service in 1902. Olympia was designated a National Historic Landmark in 1966.