West Chatham, Massachusetts, United States [CDP]; population was 1,504 in 1990; housing units was 1,639 in 1990; location is 41°41'N 69°60'W; land area is 2.96 square miles (1,897 acres); water area is 0.36 square miles (232 acres); FIPS code is 75505 [SourceCBP]