Banks Lake South is a census-designated place (CDP) in Grant County, Washington, United States. The population was 174 at the 2010 census.GeographyBanks Lake South is located in northern Grant County at, adjacent to the eastern border of Coulee City. It is on the east side of Banks Lake near its southern end, part of the Upper Grand Coulee valley.U.S. Route 2 passes through the CDP, leading east to Wilbur and west to Wenatchee. Spokane is to the east via US 2. Washington State Route 155 leads northeast from Banks Lake to the city of Grand Coulee near the Grand Coulee Dam.According to the United States Census Bureau, the Banks Lake South CDP has a total area of 7.5sqkm, of which 6.3sqkm are land and 1.2sqkm, or 16.06%, are water.DemographicsAs of the census of 2000, there were 160 people, 75 households, and 53 families residing in the CDP. The population density was 65.7 people per square mile (25.3/km²). There were 86 housing units at an average density of 35.3/sq mi (13.6/km²). The racial makeup of the CDP was 99.38% White, and 0.62% from two or more races.
