Maps showing the era-based typology, as well as housing unit density, population change trajectory and urbanization by year.
Settlement Type by Era
Settlement Type by Housing Unit Density
Tract Population Change
Tract Urbanization by Decade
Lists of urban areas sorted alphabetically or by population by year, with links to maps.
Demographic charactceristics of settlement types from the Longitudinal Tract Data Base.
Early Core - urban areas with population 50,000+ by 1940
Postwar Core - urban areas 50,000+ 1950-1990
Recent Core - urban areas 50,000+ since 2000
Mid-20th Century Suburb - Tracts added to urban areas 1940-1960
Late-20th Century Suburb - Tracts added to urban areas 1970-1990
21st Century Suburb - Tracts added to urban areas since 2000
Early Exurb - Tracts meeting exurban criteria 1960-1990
Recent Exurb - Tracts meeting exurban criteria since 2000
Micropolitan Core - urban area with population 10,000-49,999
Town Proximate - urban area with population 1,000-9,999 within 100 miles of a large urban area
Town Remote - urban area with population 1,000-9,999 more than 100 miles from a large urban area
Rural Adjacent - Rural tract sharing a border with a large urban area
Rural Proximate - Rural tract within 100 miles of a large urban area
Rural Remote - Rural tract more than 100 miles from a large urban area