Cedar Hills is a census-designated place and neighborhood in Washington County, Oregon, near the intersection of highways Oregon Route 217 and U.S. 26. Constructed starting in 1946, Cedar Hills was the largest single housing tract development in the western United States at the time of its completion in 1961.
Originally located in unincorporated Washington County, part of the neighborhood has since been annexed by the city of Beaverton, and in a plan agreed to by the county and Beaverton the remainder is scheduled for annexation in the future.
The formal Cedar Hills neighborhood currently includes 2,114 homes, whose owners are subject to the rules and covenants enforced by the area's homeowners' association, the Homes Association of Cedar Hills.
The population was 8,949 at the 2000 census.