A canton is a type of administrative division of a country. In general, cantons are relatively small in terms of area and population when compared with other administrative divisions such as counties, departments, or provinces. Internationally, the best-known cantons - and the most politically important - are those of Switzerland. As the constituents of the Swiss Confederation, theoretically (and historically), the Swiss cantons are semi-sovereign states.
Cantons exist (or existed) in the following countries: