Days Creek is an unincorporated community and census-designated place in Douglas County, Oregon, United States. At the 2010 census it had a population of 272.The community was named after the local creek, which in turn was named for Patrick and George Day, who settled near its mouth in 1851. The post office was established in 1878 as "Day's Creek", but the name was changed to "Days Creek" c. 1890.