Svensen is an unincorporated community and census-designated place (CDP) on the Columbia River in Clatsop County, Oregon, United States, named after early settler Peter Svensen. There was a post office in Svensen from 1895 to 1944. Since the closure of the Svensen Post Office, mail service has been provided by rural carriers of the Astoria, Oregon post office. Svensen is within the Knappa School District.