Milwaukie is a city in Clackamas County, Oregon, United States. A very small portion of the city extends into Multnomah County. The population was 20,291 at the 2010 census. Founded in 1847 on the banks of the Willamette River, the city, known as the Dogwood City of the West, was incorporated in 1903 and is noted as the birthplace of the Bing cherry. The city is now a suburb of Portland and also adjoins the unincorporated areas of Clackamas and Oak Grove.