CHILLICOTHE, a city of Ohio, U.S.A., on the Scioto river, 50m. S. of Columbus; the county seat of Ross county. It is on Federal highways 23 and 5o, and is served by the Baltimore and Ohio and the Norfolk and Western railways. The population in 1920 (91.5% native white) was 15,831, and was 18,340 in 1930 by Federal census. Chillicothe is the trade centre of a rich agri cultural region and coal and iron are mined nearby. The city has railway construction and repair shops, large paper-mills and other manufacturing industries, with a total factory product in 1925 valued at $10,307,059. There are ancient mounds in a State park 4m. north. Chillicothe was founded in 1796, near the site of a village of the Chillicothe Indians which had been destroyed in 1787 by Kentuckians. It was the capital of the North-west Terri tory in 1800-03, and the capital of Ohio in 1803-10 and 1812-16.