How populated is this minor civil division in Maine, of which The Forks, Maine is a good example?
The Forks, Maine: The Forks is a plantation in Somerset County, Maine, United States. Plantation (Maine): In the U.S. state of Maine a plantation is a type of minor civil division falling between township (or unorganized territory) and town. Plantation (Maine):  Plantations are typically found in sparsely populated areas.
sparsely populated