Washington State Department of TransportationPolygons depict the boundaries of Washington State's incorporated municipalities, as recorded by the Washington State Office of Financial Management. Attributes include city names as provided by the Washington State Office of Financial Management, and Federal Information Processing Standard codes(FIPS) as provided by the National Institute of Standards and Technology. The Washington State Office of Financial Management provided FIPS codes for cities incorporated after the National Institute of Standards and Technology's FIPS code publication date. GNIS (Geographic Name Information System) codes provided by the Washington State Department of Revenue have been included for this quarter. The calendar date shown by Time_Period_Of_Content is the date of annexation approval and certification by the Washington State Office of Financial Management. Please direct questions about this dataset to: TransportationGISDataSteward@wsdot.wa.gov.ArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/0d96ba84b802425aa1d2b9a99e422c5d_1engState of Washington Geospatial Open Data PortalPublicWSDOT - City Limits [Washington (State)]Web servicesWashington (State)Last Modified: 2025-12-12