Metro Data Resource CenterThe history of urban growth boundary annexations for the Portland Metro region. Areas that were added to the UGB are attributed with the year they were added. The data only contains additions for the current UGB; areas that were added to the UGB, and then subsequently removed, are not part of this data. Date of last data update: 2025-05-05 This is official RLIS data. Contact Person: Clint Chiavarini clinton.chiavarini@oregonmetro.gov 503-797-1738 RLIS Metadata Viewer: https://gis.oregonmetro.gov/rlis-metadata/#/details/2508 RLIS Terms of Use: https://rlisdiscovery.oregonmetro.gov/pages/terms-of-useArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/1b25b236f4334fb7a85342deb665cad7_0engRLIS DiscoveryPublicUGB history [Oregon--Portland]Web servicesOregon--PortlandOregonLast Modified: 2025-08-01