Clark County

• Clark County, Arkansas
• Clark County, Idaho
• Clark County, Illinois
• Clark County, Indiana
• Clark County, Kansas
• Clark County, Kentucky
• Clark County, Missouri
• Clark County, Nevada
• Clark County, Ohio
• Clark County, South Dakota
• Clark County, Washington
• Clark County, Wisconsin
• Clarke County (disambiguation)
• George Rogers Clark
• Lewis and Clark County, Montana
• William Clark (explorer)