The Bureau of the Census defines the rural population (in contrast to urban) as all persons living in the open country, plus those in places of less than 2,500 inhabitants that are beyond the densely settled (1,000 or more persons per square mile) suburban fringes of metropolitan cities. However, the Rural Development Act of 1972 defines rural as any area not included in any city or town with a population in excess of 10,000 inhabitants.