Bainbridge is a town in Monroe Township, Putnam County, Indiana, United States. The population was 746 at the 2010 census. This town was named after the prominent war hero of the time, William Bainbridge. He was one of the captains of the original six frigates of the US Navy. When Indiana officially became a state in 1816, Bainbridge's name was as well known and revered then as any celebrity today. He is perhaps most notoriously known, however, for grounding the U.S.S. Philadelphia on shoals outside of Tripoli.