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Ross County, Ohio

The Ross County Courthouse is located at 2 North Paint Street, Chillicothe, OH 45601; phone: 740-702-3085.

Old Residnetial Historic District

Photo: Adena Mansion (Thomas Worthington House), circa 0000, located on Adena Road, near Chillicothe. Benjamin H. Latrobe, architect. The district was listed on the National Register of Historic Places in 1970. Photographed by User:Analogue Kid (own work), 2007, [cc-3.0] via Wikimedia Commons, accessed October, 2022.


When formed in 1798, the county was much larger, covering much of what is now the State of Ohio. It was named for James Ross of Pennsylvania who was, at the time of county formation, a friend of the Northwest Territorial Governor, Arthur St. Clair. [www.co.ross.oh.us, accessed May, 2014]