Brown Mills, New Jersey, United States [CDP]; population was 11,429 in 1990; housing units was 4,007 in 1990; location is 39°58'N 74°34'W; land area is 5.34 square miles (3,419 acres); water area is 0.21 square miles (137 acres); FIPS code is 8440 [SourceCBP]