There are nine counties named
Knox County in the United States,
All named for Brig. General
Henry Knox who would later serve as the first Secretary of War:
- Knox County, Illinois
- Knox County, Indiana (including Vincennes, one of the oldest cities west of the Appalacian Mountains)
- Knox County, Kentucky
- Knox County, Maine
- Knox County, Missouri
- Knox County, Nebraska
- Knox County, Ohio
- Knox County, Tennessee (including Knoxville)
- Knox County, Texas