Oregon, United States·13K residents
Cornelius is a city in Washington County, Oregon, United States. Located in the Portland metropolitan area. The population was 12,694 at the 2020 census, and was estimated at 15,369 in 2024. The city lies along Tualatin Valley Highway between Forest Grove to the west and Hillsboro to the east. Cornelius was incorporated in April 1893 and is named for founder Thomas R. Cornelius.
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