There's more than one place called '''Clay County''':
Clay County (Alabama)
Clay County (Arkansas) (originally Clayton County)
Clay County (Florida)
Clay County (Georgia)
Clay County (Illinois)
Clay County (Indiana)
Clay County (Iowa)
Clay County (Kansas)
Clay County (Kentucky)
Clay County (Minnesota)
Clay County (Mississippi)
Clay County (Missouri)
Clay County (Nebraska)
Clay County (North Carolina)
Clay County (South Dakota)
Clay County (Tennessee)
Clay County (Texas)
Clay County (West Virginia)