King CountyFor more information about this layer please see the GIS Data Catalog . Boundaries of the seven King County Unincorporated Community Service Areas (CSA). The CSAs are broken out in two ways. In West King County Areas the largest potential annexation areas (PAAs) are indicated by name in the CSA_SUBAREA_NAME field while all other PAAs have a value of "Other PAAs". For the remaining six CSAs the CSA_SUBAREA_NAME is "None" for unincorporated areas and the name of the relevant city for incorporated areas. For analysis purposes, selecting the features where Unincorporated = 1 will provide only the features within the municipal jurisdiction of King County.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/e868651683f34c7f9d90a67aeb999573_0engKing County GIS Open DataPublicCommunity Service Areas with Subarea Details in King County [Washington (State)--King County]Web servicesWashington (State)--King CountyWashington (State)Last Modified: 2025-08-21