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Learn about the definitions and types of metropolitan and micropolitan statistical areas in the U.S. and Puerto Rico, as well as their number and distribution by state and territory. See maps and tables of the 935 core-based statistical areas and the 184 combined statistical areas.
A metropolitan statistical area (MSA) is a geographical region with a relatively high population density and close economic ties in the United States. Learn about the definitions, history, rankings and examples of MSAs and their components.
Percentage figures for arable land, permanent crops land and other lands are all taken from the CIA World Factbook [1] as well as total land area figures [2] (Note: the total area of a country is defined as the sum of total land area and total water area together.) All other figures, including total cultivated land area, are calculated on the ...
A comprehensive list of counties and county equivalents in the U.S. states, territories, and outlying islands, with population, area, and density data. Find out how many counties each state has, and how they are defined and used for administrative and statistical purposes.
An urban area is a human settlement with a high population density and an infrastructure of built environment. Learn about the historical growth, urbanization and classification of urban areas, and see the list of the 200 largest urban areas in the world by population.
Demography is the statistical study of human populations: their size, composition, and how they change through birth, death, and migration. Learn about the history, methods, and applications of demography from ancient times to the present.
A census tract is a geographic region defined for the purpose of taking a census. Learn how census tracts are created and used in different countries, such as the United States, Canada, France, Ireland, New Zealand and the United Kingdom.
Mean center: The mean is an important measure of central tendency, which when extended to a set of points, located on a Cartesian coordinate system, the average location, centroid or mean center, can be determined. The weighted mean center is analogous to frequencies in the calculation of grouped statistics, such as the weighted mean.