Winchester Bay is an unincorporated community in Douglas County, Oregon, United States. For statistical purposes, the United States Census Bureau has defined Winchester Bay as a census-designated place (CDP). The census definition of the area may not precisely correspond to local understanding of the area with the same name. The population of the CDP was 382 at the 2010 census. The community of Umpqua City was established in 1850.GeographyAccording to the United States Census Bureau, the CDP has a total area of 8.1km2, of which 6.0km2 is land and 2.1km2, or 26.24%, is water.Demographics2000 Census dataAs of the census of 2000, there were 488 people, 238 households, and 139 families residing in the CDP. The population density was 183.6 people per square mile (70.8/km²). There were 362 housing units at an average density of 136.2 per square mile (52.5/km²). The racial makeup of the CDP was 96.11% White, 1.43% Native American, 0.41% Asian, 0.20% from other races, and 1.84% from two or more races. Hispanic or Latino of any race were 1.43% of the population. There were 238 households out of which 16.8% had children under the age of 18 living with them, 50.8% were married couples living together, 4.2% had a female householder with no husband present, and 41.2% were non-families. 36.6% of all households were made up of individuals and 20.2% had someone living alone who was 65 years of age or older. The average household size was 2.01 and the average family size was 2.57.
