A region that is administered as part of a county rather than as an independent city is commonly referred to as an "unincorporated area"
A region that is administered as part of a county not a city, is referred to as?
In many countries, including the United States, a county is a political and administrative division of a state, and within a county, there can be areas that are not part of any city or municipality. These areas are typically referred to as unincorporated areas.
In contrast, an incorporated area is one that has its own local government, such as a city or town government.