Pierce County, WashingtonPierce County boundary polygon based on geographic features mentioned in the legal description and tax parcels. Please note that some geographic features like rivers have moved which may cause changes to the county boundary. Please read the metadata ( https://matterhorn.piercecountywa.gov/GISmetadata/pdbis_county_boundary_poly.html ) for additional information. Any data download constitutes acceptance of the Terms of Use ( https://matterhorn.piercecountywa.gov/disclaimer/PierceCountyGISDataTermsofUse.pdf ) .ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/44635ff925264b66ab27847b34f78d67_0engPierce County Open GeoSpatial Data PortalPublicPierce County Boundary polygon [Washington (State)--Pierce County]Web servicesWashington (State)--Pierce CountyWashington (State)Last Modified: 2019-06-10