 Copalis Beach is located at (47.117784, -124.178435).According to the United States Census Bureau, the CDP has a total area of 3.8 square miles (9.8 km2), of which, 3.7 square miles (9.6 km2) of it is land and 0.1 square miles (0.3 km2) of it (2.63%) is water.As of the census of 2000, there were 489 people, 232 households, and 135 families residing in the CDP.