Three Lakes is a census-designated place (CDP) in Snohomish County, Washington, United States. The population was 3,941 at the 2020 census.
Geography
According to the United States Census Bureau, the CDP has a total area of 10.2 square miles (26.4 km<sup>2</sup>), of which, 9.8 square miles (25.4 km<sup>2</sup>) of it is land and 0.4 square miles (1.0 km<sup>2</sup>) of it (3.92%) is water.
Demographics
As of the census