The Census Bureau releases population estimates annually for the United States and Puerto Rico. Every decade, this provides the opportunity to examine these estimates side-by-side with the results of the decennial census. Comparisons of preliminary 2010 estimates and census counts are now available for U.S. states and the Puerto Rico Commonwealth. Comparisons for U.S. counties and Puerto Rico municipios will be made available after all Census 2010 counts are released for these areas. For background on how the estimates were produced, see the Release Notes for Preliminary Vintage 2010 Estimates.
To view complete the complete details on Population Estimates created by the U.S. Census Bureau visit: http://www.census.gov/popest/research/eval-estimates/eval-est.html