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Chelmsford

1. Chelmsford, Massachusetts, United States [CDP]; population was 32,388 in 1990; housing units was 11,817 in 1990; location is 42°36'N 71°22'W; land area is 22.66 square miles (14,504 acres); water area is 0.53 square miles (341 acres); FIPS code is 13100 [SourceCBP]
2. Chelmsford, Massachusetts, United States Postal Service Zip Code is 01824 (South Chelmsford) [SourcePSZ]