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Introduction to Census Data

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American University Librarians
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U.S. and World Population Clock

The interactive Census Population Clock displays the resident count based on monthly national population estimates. It is searchable by year back to 2010 as well as by state, county and city.

Census Website QuickFacts

QuickFacts is an easy to use application website from the Census Bureau that provides tables, maps, and charts of frequently requested statistics from many Census Bureau censuses, surveys, and programs. Profiles are available for the nation, all 50 states plus the District of Columbia and Puerto Rico, and all counties. Cities and towns with a population of 5,000 or more are also included. Results can viewed as charts, tables, or maps. Please see these FAQs for more information.

The Census Bureau's free data site, with latest census and American Community survey tables at all levels of geography. Covers 2000 to the present.  FAQs can be found here.