Curlew Lake is located in northwestern Ferry County at coordinates 48°43′49″N 118°39′58″W. The community includes all of Curlew Lake, a 5 miles water body at the head of Curlew Creek, as well as land on all sides of the lake, bounded to the east by Washington State Route 21, to the south by West Herron Creek Road, and to the west and north by West Curlew Lake Road.