Cottage Lake is a census-designated place in King County, Washington, United States. The population was 22,494 at the 2010 census. The lake itself falls within the 98072 ZIP code, while the developments east of the lake fall under the 98077 ZIP code.
AdLakeWashingtonCottage Rentals - Perfect for Families and Budgets of All Sizes! Filter by Your Favorite Amenities: Swimming Pool, Hot Tub, Grill, WiFi, Kitchen and More.