The population count of Washington County, OR was 547,451 in 2014.


Population Change

Above charts are based on data from the U.S. Census American Community Survey | ODN Dataset | API - Notes:

1. ODN datasets and APIs are subject to change and may differ in format from the original source data in order to provide a user-friendly experience on this site.

2. To build your own apps using this data, see the ODN Dataset and API links.

3. If you use this derived data in an app, we ask that you provide a link somewhere in your applications to the Open Data Network with a citation that states: "Data for this application was provided by the Open Data Network" where "Open Data Network" links to Where an application has a region specific module, we ask that you add an additional line that states: "Data about REGIONX was provided by the Open Data Network." where REGIONX is an HREF with a name for a geographical region like "Seattle, WA" and the link points to this page URL, e.g.

Demographics and Population Datasets Involving Washington County, OR

  • API

    WAOFM - Census - Population Density by County by Decade, 1900 to 2010 | Last Updated 2016-08-09T16:28:24.000Z

    Washington state population density by county by decade 1900 to 2010.

  • API

    WAOFM - April 1 - Population by State, County and City, 1990 to Present | Last Updated 2016-06-30T18:17:22.000Z

    Intercensal and postcensal population estimates for the state, counties and cities, 1990 to present.

  • API

    King County History Timeline | Last Updated 2015-04-24T21:09:04.000Z

    Milestones in the history of King County, Washington

  • API

    Population and Economic Indicators | Last Updated 2016-11-18T18:52:00.000Z

    A set of basic demographic and economic data such as population, jobs, business licenses, income and poverty rate.

  • API

    WAOFM - April 1 - Population Density by County, 2000 to Present | Last Updated 2016-06-30T18:13:52.000Z

    Intercensal and postcensal housing estimates of population density for the state, counties, and cities, 1990 to present.

  • API

    King County Health Reform Indicators | Last Updated 2014-12-17T00:09:12.000Z

    Health reporting area (HRA) and zip code-level indicators for monitoring the impact of the Affordable Care Act in King County, WA. Topic areas range from access to care to population health. Imported to Socrata to allow data to be pulled as JSON from SODA to feed into Leaflet.js-based maps on an external site.

  • API

    WAOFM - Census - Population and Housing, 2000 and 2010 | Last Updated 2016-08-09T16:23:33.000Z

    Population and housing information extracted from decennial census Public Law 94-171 redistricting summary files for Washington state for years 2000 and 2010.

  • API

    Medicare Beneficiary Enrollment and Demographics, Washington State and Counties, 2007-2014 | Last Updated 2016-05-16T23:56:57.000Z

    (Source: CMS Medicare Geographic Variation Public Use File, December 2015)

  • API

    Oregon Populated Places | Last Updated 2013-03-01T18:12:24.000Z

    This point theme shows the location of populated places in the state of Oregon as derived from the 1:24,000 GNIS theme. This dataset was created from the USGS GNIS database. Several SSCGIS staff members have worked on this theme over the years. Procedures_Used: The orppl theme was delineted from the 1990 GNIS theme. To get an idea how this coverage was created download the GNIS metadata. The orppl point theme was generated as the orcov theme. It was built for point topology after the theme was generated. it was than copied to oregnis. Arcedit was used to populate the coverage by selecting ppl from the desig item. The theme was again built for point topology. the theme was imported in 1991 and copied to the gniscov name. External was used 5 times to populate the database. the theme was then exported as gniscov. The gniscov was edited and built for point topology. Reselect was used twice. ArcEdit was used 6 times to edit the theme and than renamed to orppl. The theme was than built for point topology. The theme was than copied twice. One of these copies ws overlayed with house90 using the identity using the point .1 fuzzy tolerance and join options to join the two themes together. The theme was than copied to another directory. In the new directory the theme was edited 7 times and build for point topology. The theme was than renamed orppl and copied two more times. The theme was exported twice and built once between 1993 and 1995. The Projectcopy command was used to copy the projection info from the citylimits theme to the orppl. The theme was than exported twice and imported back in to be projected into the Oregon State transfer standard. The theme was built for point topology and imported back in so that metadata could be created for it.

  • API

    Poverty Estimates for Washington Counties Age 0-17 | Last Updated 2016-01-21T05:40:06.000Z