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:
... spread out with 22.3% under the age of 18, 8.0% from 18 to 24, 31.0% from 25 to 44, 21.9% from 45 to 64, and 16.9% who are 65 years of age or older. The median age is 39 ...