Census 2010

OFM data products

To access a variety of 2010 Census data products specific to Washington state, please follow the link below.

Summary File 2 data

The 2010 Census Summary File 2 data for Washington state was release February 2012. Summary File 2 provides detailed demographic information from the 2010 Census for up to 331 different race and ethnic groups.

Summary File 1 data

The 2010 Census Summary File 1 data for Washington state was released in August 2011. Summary File 1 provides detailed information on age, sex, households, families, relationship to householder, housing units, detailed race and Hispanic or Latino origin groups, and group quarters.

Demographic Profile data

The 2010 Census Demographic Profile Summary File data for Washington state was released in May 2011.  The Demographic Profile Summary File provides information on age and sex distributions, race, Hispanic or Latino origin, household relationship and type, the group quarters population, and housing occupancy and tenure.

Redistricting data

The 2010 Census Public Law 94-171 Redistricting Data Summary File data for Washington state was released in February 2011. The redistricting data was used by state officials to realign congressional and state legislative districts. The redistricting data provides population and housing counts for small areas including population by race and ethnicity for both the total population and the population over age 18 years old and housing units by occupancy status (occupied and vacant units).

For more information, visit:

Note: For data products based on the new 2012 congressional and legislative district boundaries (Washington State Redistricting Commission plans C-JOINTSUB_2-1 and L-JOINTSUB_3-2 as amended by Engrossed House Concurrent Resolution 4409), visit:

Apportionment data

The apportionment population represents the first official 2010 Census numbers released by the U. S. Census Bureau. The apportionment counts are used to distribute the 435 seats of the House of Representatives among the 50 states based on each state’s population. The apportionment population includes the resident population plus the overseas population consisting of military and federal civilian employees and their dependents living with them who could be allocated to a state.

Summary for Washington state

  • The apportionment population for Washington state is 6,753,369.
  • Based on the apportionment population, Washington state earned one new seat in the House of Representatives. The state will have a total of 10 seats beginning with the 113th Congress.
  • The resident population for Washington state is 6,724,540.
    • The resident population increased by 14.1 percent, or 830,419 people between 2000 and 2010.
    • Washington is now the 13th most populous state, up from 15th in 2000.
    • Washington was the 8th fastest growing state between 2000 and 2010 in terms of numeric increase and the 13th fastest growing state in terms of percentage increase in resident population.
  • The overseas population for Washington state is 28,829.

Related data products

American Community Survey

Detailed demographic, social, housing, and economic data that used to be collected via the decennial census long form are now being collected via the American Community Survey (ACS). ACS data products can be accessed from OFM’s ACS website or the Census Bureau's ACS website.

Census TIGER/Line shapefiles

For data users with geographic information system (GIS) software, the 2010 Census TIGER/Line shapefiles can be accessed from OFM’s GIS website or the U.S. Census Bureau's website. Demographic data from the Census 2010 can be joined with the GIS shapefile using a geographic entity code common to both datasets.

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OFM's involvement with the 2010 Census

The 2010 Census was conducted by the U.S. Census Bureau, which is part of the federal Department of Commerce. As a State Data Center and Federal State Cooperative for Population Estimates program member, OFM serves as a liaison between the State and Census Bureau, acts as an advocate for census related issues specific to Washington state, and facilitates the Census Bureau's mission of attaining a complete and accurate 2010 census count. To help fulfill those roles, OFM:

  • Although OFM was ready to provide assistance to local governments seeking to challenge their jurisdiction’s 2010 Census count through the Count Question Resolution (CQR) Program, no formal challenges were submitted by local governments.
  • Delineated 2010 Public Use Microdata Areas (PUMAs) within Washington according to Census Bureau 2010 criteria and guidelines. OFM worked with local stakeholders to ensure that the PUMA definitions will meet the needs of a variety of data users for the rest of the decade.
  • Reviewed the 2010 Census group quarters list for accuracy in relation to missed/misallocated facilities. OFM staff spent one week at Census headquarters participating in the Census Count Review Program, Part 2 Group Quarters Review.
  • Prepared a statewide address list of housing units to compare to the Census Bureau's Master Address File (MAF) for the Census Count Review Program, Part 1 the Housing Unit Review. OFM staff spent one week at Census headquarters comparing the state housing list to the MAF with the goal of identifying clusters of housing units that may have been missed during the census address canvass procedure.
  • Initiated a request to include Washington's Urban Growth Area (UGA) boundaries as 2010 census geography. In conjunction with the state Departments of Commerce, Ecology, and Transportation, regional planning organizations, and county governments planning under Washington's Growth Management Act, representatives were able to submit the required documentation to the Census Bureau in February 2010. As a result, population and housing information are now available by UGAs for state and local government planning purposes.
  • Validated the quality and accuracy of municipal boundary changes submitted for use in the 2010 Census. The Boundary and Annexation Survey (BAS) is an annual program the Census Bureau uses to track municipal boundary changes. Many state and federal programs use census data and boundaries as a basis for per capita fund distribution. It is especially important to have accurate municipal boundaries at the 2010 census point. OFM also helps facilitate the exchange of information, between local governments and the Census Bureau, necessary to support the program. OFM cannot submit boundary changes on behalf of cities and towns. The Census Bureau can only accept these changes directly from local governments.
  • Contributed to a more complete and accurate census for Washington state by reviewing and commenting on the list of residential housing unit and group quarters addresses the Census Bureau uses to deliver questionnaires. The Local Update of Census Addresses (LUCA) program allows the Census Bureau to benefit from local knowledge in developing its MAF/TIGER Database for the 2010 Census.
  • Held the Complete Count Committee kick-off meeting in November 2009 (in coordination with the Governor's office, OFM, and the Department of Commerce) with Governor Chris Gregoire and Commerce Secretary Gary Locke as keynote speakers. Since then, 32 state agencies joined the partnership and engaged in a variety of census activities (i.e., creating Census 2010 websites, distributing census posters, sending emails to employees, and participating in the Census Bureau's 2010 promotional programs).

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