Parsippany-Troy Hills Township, New Jersey, United States [CDP]; population was 48,478 in 1990; housing units was 18,960 in 1990; location is 40°52'N 74°25'W; land area is 23.90 square miles (15,293 acres); water area is 1.48 square miles (944 acres); FIPS code is 56475 [SourceCBP]