Oak Grove is an unincorporated community and census-designated place in Clackamas County, Oregon, United States. The population was 17,290 as of the 2020 census. Oak Grove was named at the suggestion of Edward W. Cornell, a member of the surveying party that platted the townsite in the 1890s. The company that was developing the propert…Oak Grove is an unincorporated community and census-designated place in Clackamas County, Oregon, United States. The population was 17,290 as of the 2020 census. Oak Grove was named at the suggestion of Edward W. Cornell, a member of the surveying party that platted the townsite in the 1890s. The company that was developing the property had not been able to come up with a good name for the place, and Cornell suggested "Oak Grove" after a crew ate lunch in a stand of oak trees in the northwestern part of the tract.
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