The population count of Clark County, WA was 457,474 in 2017. The population count of Pierce County, WA was 845,193 in 2017.

Population

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 http://opendatanetwork.com. 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. http://opendatanetwork.com/region/1600000US5363000/Seattle_WA

Demographics and Population Datasets Involving Clark County, WA or Pierce County, WA

  • API

    WAOFM - Census - Population and Housing, 2000 and 2010

    data.wa.gov | 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.

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    WAOFM - Census - Population Density by County by Decade, 1900 to 2010

    data.wa.gov | Last Updated 2016-08-09T16:28:24.000Z

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

  • API

    Washington Driver License In State Migration

    data.wa.gov | Last Updated 2019-01-03T23:56:56.000Z

    The number of drivers from other states and countries who were issued new Washington driver licenses and the county they moved to.

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    Poverty Estimates for Washington Counties Age 0-17

    data.wa.gov | Last Updated 2016-01-21T05:40:06.000Z

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    Water Quality Index Scores (1994-2013) from The WA State Department of Ecology's River and Stream Monitoring Program.

    data.wa.gov | Last Updated 2014-05-01T22:58:16.000Z

    Routine freshwater monitoring data collected by the The WA State Department of Ecology's River and Stream Monitoring Program are summarized by a technique called the "Water Quality Index" (WQI). The WQI ranges from 1 (poor quality) to 100 (good quality). The WQI summary does not include non-standard elements like metals. For temperature, pH, oxygen, and fecal coliform bacteria, the WQI is based on criteria in Washington’s Water Quality Standards, WAC 173-201A. For nutrient and sediment measures where standards are not specific, results are based on expected conditions in a given region. Multiple constituents are combined and results aggregated over time to produce a single score for each station and each year.

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    WDFW-Hatchery Programs

    data.wa.gov | Last Updated 2019-11-16T09:05:09.000Z

    A list of hatchery programs presented in the Salmon Conservation Reporting Engine (SCoRE)

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    Annual 2013 Water Quality Index Scores

    data.wa.gov | Last Updated 2014-11-18T18:28:21.000Z

    Routine freshwater monitoring data collected by the The WA State Department of Ecology's River and Stream Monitoring Program are summarized by a technique called the "Water Quality Index" (WQI). The WQI ranges from 1 (poor quality) to 100 (good quality). The WQI summary does not include non-standard elements like metals. For temperature, pH, oxygen, and fecal coliform bacteria, the WQI is based on criteria in Washington’s Water Quality Standards, WAC 173-201A. For nutrient and sediment measures where standards are not specific, results are based on expected conditions in a given region. Multiple constituents are combined and results aggregated over time to produce a single score for each station and each year.

  • API

    Educational Attainment of Washington Population by Age, Race/Ethnicity/, and PUMA Region

    data.wa.gov | Last Updated 2019-05-16T19:13:48.000Z

    The American Community Survey (ACS) is designed to estimate the characteristic distribution of populations* and estimated counts should only be used to calculate percentages. They do not represent the actual population counts or totals. Beginning in 2019, the Washington Student Achievement Council (WSAC) has measured educational attainment for the Roadmap Progress Report using one-year American Community Survey (ACS) data from the United States Census Bureau. These public microdata represents the most current data, but it is limited to areas with larger populations leading to some multi-county regions**. *The American Community Survey is not the official source of population counts. It is designed to show the characteristics of the nation's population and should not be used as actual population counts or housing totals for the nation, states or counties. The official population count — including population by age, sex, race and Hispanic origin — comes from the once-a-decade census, supplemented by annual population estimates (which do not typically contain educational attainment variables) from the following groups and surveys: -- Washington State Office of Financial Management (OFM): https://www.ofm.wa.gov/washington-data-research/population-demographics -- US Census Decennial Census: https://www.census.gov/programs-surveys/decennial-census.html and Population Estimates Program: https://www.census.gov/programs-surveys/popest.html **In prior years, WSAC used both the five-year and three-year (now discontinued) data. While the 5-year estimates provide a larger sample, they are not recommended for year to year trends and also are released later than the one-year files. Detailed information about the ACS at https://www.census.gov/programs-surveys/acs/guidance.html

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    Demographic - Population Percent by Sex by County WA

    internal.open.piercecountywa.gov | Last Updated 2019-10-16T22:52:25.000Z

    Population estimates for percentage of males and females in an area.(DP05, variables: DP05_0001E, DP05_0002E, DP05_0003E). County and State values are from the ACS 1 Year Survey.

  • API

    Voter Precinct to Jurisdiction Crosswalk

    data.wa.gov | Last Updated 2018-04-09T22:30:31.000Z

    The PDC uses this data set for its online web applications to assist the public in finding information relative to a particular jurisdiction. It is provided here for the purpose of assisting application developers and may be of limited interest for the general public. This dataset is a subset (copy) of voter registration records provided to the Public Disclosure Commission by the Washington Secretary of State (SOS) under the terms of SOS and applicable law. Use of this data is governed by any restrictions or limitations of the original release by SOS. By accessing this data you are agreeing to use the data in accordance with the RCW 29A.08.720, RCW 29A.08.740 and RCW 42.56.070(9) and any other applicable law. This data set can be used to correlate a precinct to a PDC jurisdiction and office. These data are provided as-is and may contain errors or omissions. Please refer to the SOS for the most recent precinct data.