Cooper Mountain is a 764-foot summit in Washington County, Oregon, named for Perry Cooper, an immigrant from Ohio who settled there. Over time, the mountain’s name extended beyond the hill itself to the surrounding area and to nearby landmarks and institutions, including Cooper Mountain Nature Park, Cooper Mountain Vineyards, Cooper Mountain Elementary School, and local churches and cemeteries. Its significance lies in how a single settler’s name became attached to a broad local landscape, making the mountain an enduring geographic reference point in the community.