Sudden Valley, Washington, United States [CDP]; population was 2,615 in 1990; housing units was 1,430 in 1990; location is 48°43'N 122°21'W; land area is 6.29 square miles (4,025 acres); water area is 1.86 square miles (1,192 acres); FIPS code is 68200 [SourceCBP]
