When recording information about the locations where births, deaths, marriages, divorces, land and property transactions, wills, and other events occurred, it is essential to include the name of the county, parish, province, shire, state, or other geopolitical jurisdiction at the time the event was recorded. Inclusion of a county name, for example, points other researchers to the right place when they want to verify your research and access the records for themselves. Most genealogical software programs will also prompt you to repeat this practice as you record future sources. Along with entering correct source citations, this diligence in recording precise geopolitical jurisdiction information is the mark of a scholarly researcher.
-Taken from ancestry.com