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.
Purpose: For mapping areas of historic significance in Portland.
Update Frequency: As needed
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