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The concept of the center of population as used by the U.S. Census Bureau is that of a balance point. The center of population is the point at which an imaginary, weightless, rigid, and flat (no elevation effects) surface representation of the 50 states (or 48 conterminous states for calculations made prior to 1960) and the District of Columbia would balance if weights of identical size were placed on it so that each weight represented the location of one person.
Text file containing population and mean centers of population by state/state equivalent entity for the 2000 Census. The record layout is:
State/state equivalent entity-based text files containing the mean centers of population for each county/county equivalent entity within a state/state equivalent entity for the 2000 Census. The record layout is:
State/state equivalent entity-based text files containing the mean centers of population for each census tract within a state/state equivalent entity for the 2000 Census. The record layout is:
State/state equivalent entity-based text files containing the mean centers of population for each census block group within a state/state equivalent entity for the 2000 Census. The record layout is: