Lynden, Washington, United States [City]; population was 5,709 in 1990; housing units was 2,167 in 1990; location is 48°57'N 122°27'W; land area is 2.75 square miles (1,763 acres); water area is 0.01 square miles (5 acres); FIPS code is 40805 [SourceCBP]