West Side Highway, Washington, United States [CDP]; population was 3,641 in 1990; housing units was 1,371 in 1990; location is 46°11'N 122°55'W; land area is 2.50 square miles (1,598 acres); water area is 0.11 square miles (73 acres); FIPS code is 77745 [SourceCBP]