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Research Guides

U.S. Decennial Census: 2010

Decade by decade information about how to access and use U.S. Census reports.

Census By Decade

1790  1800  1810  1820  1830  1840  1850  1860  1870  1880  1890  1900

1910  1920  1930  1940  1950  1960  1970  1980  1990  2000  2010  2020

About the 2010 census



  • 23rd decennial census
  • US population: 308,745,538
  • Washington population: 6,724,540

Questions asked

  • Online from the census bureau here
  • Information obtained from all persons:
    • Name
    • Sex
    • Age and Date of Birth
    • Race and whether of Hispanic, Latino, or Spanish origin
    • Number of people staying in the house/apartment/mobile home on April 1, 2010
    • Is the house/apartment/mobile home owned with mortgage, owned without mortgage, rented, or occupied without rent?
    • Does the head of household sometimes live or stay somewhere else?

Additional Resources


Guides and Documentation

More Information from the Census Bureau

Statistics: Census Compilations

Raw Data Files

Population Schedules

Census population schedules (or "name schedules" or "manuscript census") are copies of the original questionnaires collected during each decennial census. They list the individual names and family information of the people enumerated. Unlike the statistics published soon after the census, the population schedules remain confidential for 72 years. 1930 is the most recent population schedule available. Below are links to print and on-line versions of the population schedules. The library also has selected population schedules available on microfilm.


Need help?  Call the Government Publications, Maps, Microforms & Newspapers help desk at (206) 543-4164 during desk hours.  You can also consult the Ask Us! reference service (24/7).