Department of Archaeology and Historic PreservationThese data represent locations of National and/or State Register listed Historic properties reported with the Washington State Department of Archaeology and Historic Preservation and the National Park Service. Sites not listed on either register are not included. These data are a work in progress and are constantly being updated. Data updates should be obtained every 3 months from DAHP. Archaeology sites are within the database portion and listed as Address Restricted. All archaeology sites are located within the archaeology GIS layer and requires special datasharing arrangements to be made.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/2fb909843215410f8c4ba42f3c66f674_0engState of Washington Geospatial Open Data PortalPublicDAHP – Register Districts [Washington (State)]Web servicesWashington (State)Last Modified: 2025-12-02