Oregon Historical County Records Guide
Washington County Records Inventory
Maps, Plans, and Drawings
Series provides a visual representation of the county and of physical structures constructed on county lands. Series includes maps, plans, and drawings that vary in size, scale, and date. Included are maps, plans, and drawings of counties and cities, election precincts, courthouses and other county buildings, cemeteries, rivers, Indian reservations, school districts, construction projects, and soil classifications. General road maps may be found in the series titled Road and Bridge Records. Technical road survey maps may be found in the series titled Road Maps and Survey Notes.
The searchable InterMap GIS database includes maps showing contours and USGS quadrangles as well as assessor maps and related information. The searchable iSpirits research tool includes map layers that display contours, water bodies, city limits, USGS quadrangles, and related information as well as images of tax and section maps.
Records at the Public Services Building, Suite 200, Survey Division Main Office:
Map of Washington County Oregon [Withycombe Wall Map-includes land claim boundaries], 1895 (1 map);
Metsker's Atlas of Washington County Oregon, 1937 (1 volume); 1964 (1 volume);
Obsolete Tax Maps Films [by township and range], n.d.-ca.1999 (16 inches of microfiche).
Records at the Public Services Building, Suite 200, Survey Division Vault:
BPA Maps [Bonneville Power Administration-flat], ca.1939-ca.1963 (.75 cu.ft.);
[Miscellaneous Maps-includes city, vicinity, district, and road-rolled], ca.1967-ca.1985 (ca.75 maps);
USGS [U.S. Geological Survey Quadrangle Maps], 1955-1992 (ca.50 maps).
Records at the Public Services Building, Suite 200, Survey Division Office, Counter Area:
[Assessor's Maps-hanging], n.d.-present (53 volumes);
USGS Quads [U.S. Geological Survey Quadrangle Maps], 1956-1979 (1 volume).
Records at the Public Services Building, Suite 350, Land Development Division Office, Counter Hanging Map Area:
FIRM Map Index [Flood Insurance Rate Map], 2005 (1 volume);
Flood Plain Maps, 1974 (1 volume);
Wetlands Inventory [Maps], 1981 (1 volume).
Records at the Public Services Building, Suite 350, Long Range Planning Division Office, Map Cabinet:
[Miscellaneous Maps-includes urban growth boundary expansion, transportation, flood emergency, wetlands, geology, topographical, election precinct], ca.1967-present (ca.200 maps).
Records at the Public Services Building, Conference Room 235, Assessment and Taxation Temporary Map Storage Area:
Bonneville Power Admin. Books [Administration-Right of Way Maps]. 1939-1971 (3 binders);
[Highway and Railroad Right of Way Strip Maps-rolled], ca.1910-ca.1971 (ca.150 maps);
Metsker's Maps [Metsker's Atlas of Washington County Oregon], 1937 (1 volume); 1964 (1 volume);
Misc. Maps & Drawings [includes road, intersection, and railroad-mostly rolled], ca.1950-ca.1996 (ca.100 maps);
[Soil Class Maps-hanging], n.d. (12 volumes);
U.S.G.S. Maps [U.S. Geological Survey Quadrangle], 1915-1961 (ca.25 maps);
Voided Mylar Maps [Replaced Assessor's Maps], n.d.-present (ca.200 maps).
Records at the Washington County Historical Museum:
[Atlas of Washington County Oregon-Wilkes Bros.-includes Donation Land Claims], vol. 1-3, 1909 (3 volumes);
Fire Insurance Map of Forest Grove Ore. [Sanborn], 1912-1951 (1 volume);
Fire Insurance Map of Hillsboro Ore. [Sanborn], ca.1921-ca.1931 (1 volume); ca.1921-ca.1958 (1 volume);
Map of Washington County Oregon [T.S. Wilkes-includes Donation Land Claims-wall map], 1911 (1 map);
Metsker's Atlas of Washington Co. Oregon, 1928 (1 volume);
[Miscellaneous Maps and Plans-includes land claim, Sanborn insurance, topographical, transportation, vicinity, subdivision, and other topics], ca.1850-ca.1985 (ca.1500 maps);
Sanborn Maps [Fire Insurance-includes Banks, Beaverton, Cornelius, Forest Grove, Hillsboro, North Plains, Sherwood, and Tigard], 1884-1921 (4 inches of aperture cards).
Records at a Related Web Site:
Tax Assessment GIS Maps [select county], n.d.-present (Internet).