King CountyFor more information about this layer please see the GIS Data Catalog . Current King County Urban Growth Area Boundaries. The Comprehensive Plan designates an UGA which includes areas and densities sufficient to permit the urban growth that is projected to occur in the County for the succeeding 20-year period. Layer is created in reference to King County ordinances that established and amended the Urban Growth Areas. The main point of refference is the cadastral layer maintained by King County Department of the Assessor.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/49907b9ea8f3485b9f5d6a3c14284d07_0engKing County GIS Open DataPublicUrban Growth Areas for King County [Washington (State)--King County]Web servicesWashington (State)--King CountyWashington (State)Last Modified: 2025-07-24