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, Room 202, Survey Section Vault:
[Assessor's Maps-hanging], n.d. (53 volumes);
[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 350, Current Planning Section Office:
Flood Insurance Rate Map, 1982-2003 (ca.50 maps);
Flood Plain Maps, 1974 (1 volume);
Wetlands Inventory [Maps], 1981 (1 volume).
Records at the Public Services Building, Suite 350, Long Range Planning Section 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, Suite 240, Assessment & Taxation Department, Cartography Division Office:
[Assessor's Maps], n.d.-present (ca.15 cu.ft.);
Bonneville Power [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);
Hwy & RR Index Maps [Highway and Railroad], ca.1910-c.1971 (2 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);
Old Tax Map Book [Tax Lot Maps-Oregon Blue Print Co.], 1949-1950 (1 volume);
Voided Maps [Replaced Assessor's Maps-mylar], n.d.-present (ca.200 maps).
Records at the Walnut Street Center Building, Second Floor, Survey Section Land Corner Unit Office Area:
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).
Records at the Walnut Street Center Complex, Building E, County Historical Records Vault:
Appraisal Maps Farm & Forest, ca.1985-ca.1992 (3 cu.ft.);
Original Assessor Map Aperture Cards, n.d. (.75 cu.ft.).
Records at the Northwest Regional Education Service District Office, Vault:
Metsker's Atlas of Washington County Oregon, 1964 (1 volume).
Records at the Washington County Museum, Research Library and Archives:
[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);
General Library Index [includes index to miscellaneous maps], n.d. (1 binder);
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).
Records at the Washington County Web Site:
Election Maps [Districts], n.d.-present (Internet);
Map Gallery [Miscellaneous Maps-includes election, environmental, general, land corner, land use, locational, planning, survey, and transportation], 2000-present (Internet);
Section Map Search Tool [Searchable Database], n.d.-present (Internet);
Tax Maps Search [Searchable Database], n.d.-present (Internet).
Records at a Related Web Site:
Tax Assessment GIS Maps [select county], n.d.-present (Internet).