20210304 08065400 1.0 TRUE Historic Districts Historic districts are geographic areas thathave a concentration of thematically related historic resources. In general, historic districts have historic significance to the City of Portland, at a minimum, and they are usually also significant at the regional, statewide or national levels. Like historic landmarks, there are two types of historic district: 1) "local" historic districts, designated by the City; and 2) "National Register" districts, those listed on the<a target="_blank" rel="nofollow" href="http://www.cr.nps.gov/nr/">National Register of Historic Places</a>. Portland has 15 historic districts, primarily located in or near the Central City. All of Portland's historic districts are listed in the National Register. --Additional Information: Category: Boundary Purpose: For mapping areas of historic significance in Portland. Update Frequency: As needed -- Metadata Link: https://www.portlandmaps.com/metadata/index.cfm?&action=DisplayLayer&LayerID=53586 Bureau of Planning and Sustainability