Mill Plain is an unincorporated area in Clark County, Washington, United States. At the 2000 census it was defined as a census-designated place (CDP) and had a population of 7,400. The area was not listed as a CDP for the 2010 census.

Geography

The Mill Plain area is located in southern Clark County. The community bordered by the city of Vancouver to the west and south and by the city of Camas to the southeast.

According to the United States Census Bureau, in 2000 the CDP had a total area of 6.0 square miles (15.5 km), all of it land.

Demographics

As of the census