Mean center of the United States population
The mean center of the United States population is determined by the United States Census Bureau from the results of each national census. The Bureau defines it as follows:
After moving roughly west by south during the 19th century, the shift in the mean center of population during the 20th century was less pronounced, moving west and south. Nearly 79% of the overall southerly movement happened between 1950 and 2000.The shift projected for the 2010–2020 period would be the shortest centroid movement since the Great Depression intercensal period of 1930–1940.
