The traditional counties of England are historic subdivisions of the country into around 40 regions. They were used for administrative purposes for hundreds of years, and over time became established as a geographic reference frame. The usually-accepted set of counties was established in the 12th century, although it did not become finalised until the 16th century. After local government reform since the late 19th century, they are no longer in general use for geographic purposes (in favour of ceremonial counties or administrative counties), but the system in use is partially based on the traditional counties, and the postal counties often still follow them. Read the rest of this article: http://en.wikipedia.org/wiki/Traditional_counties_of_England