Subnational entity is a generic name for an administrative region within a country (normally with a local government encompassing multiple municipalities, counties or provinces with a certain degree of autonomy in a varying number of matters. It is separate from other forms of dependent areas.
Designations
Some of the designations for subnational entities are:
... Valley separates the two ranges. Susuanaisky and Tonino-Anivsky ranges traverse the island in the south, while Northern-Sakhalin plain occupy most of its north. ...