USS Philadelphia (CL-41) was a of the United States Navy. She was the fifth ship named for Philadelphia, Pennsylvania.

United States Navy

Inter-war period

After fitting out, the cruiser departed Philadelphia on 3 January 1938 for shakedown in the West Indies followed by additional alterations at Philadelphia and further sea trials off the Maine coast.

Philadelphia stood out of Pearl Harbor on 22 May 1941 to resume Atlantic operations, arriving Boston on 18 June. At this point, she commenced Neutrality Patrol operations, steaming as far south as Bermuda and as far north as Halifax, Nova Scotia. She entered Boston Navy Yard on 25 November for upkeep, and was in repair status there when the Japanese attacked Pearl Harbor.