There's more than one place called '''Clark County''' or '''Clarke County''':
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:
Clarke County (Alabama)
Clarke County (Georgia)
Clarke County (Iowa)
Clarke County (Mississippi)
Clarke County (Virginia)