 Waller is located at (47.204286, -122.367698).According to the United States Census Bureau, the CDP has a total area of 9.2 square miles (24.0 km²), of which, 9.2 square miles (23.9 km²) of it is land and 0.04 square miles (0.1 km²) of it (0.43%) is water.As of the census of 2000, there were 9,200 people, 3,585 households, and 2,505 families living in the CDP.