Counties are available to all address records.
Note: You cannot delete a record that is in use. One solution is to create an entry called, "Undefined" or "Unknown" and merge the unwanted entries into that one.
1.On the Home ribbon, choose Lists from the Settings section.
2.On the System Lists window, expand the Addresses section.
4.Modify the list as needed.
Entries on this list can be combined into one. See Merging/Combining Values for details.