Each county is divided into municipal corporations, which can be one of four types: cities, boroughs, townships, and incorporated towns. The Commonwealth does not contain any unincorporated land that is not served by a local government. However, the US Postal Service has given names to places within townships that are not incorporated separately. For instance King of Prussia is a census-designated place, having no local government of its own. It is rather contained within Upper Merion Township, governed by Upper Merion's supervisors, and considered to be a part of the township.