Carlstadt, New Jersey, United States [Borough]; population was 5,510 in 1990; housing units was 2,449 in 1990; location is 40°49'N 74°4'W; land area is 3.95 square miles (2,531 acres); water area is 0.27 square miles (171 acres); FIPS code is 10480 [SourceCBP]