South Amboy, New Jersey, United States [City]; population was 7,863 in 1990; housing units was 3,057 in 1990; location is 40°29'N 74°17'W; land area is 1.55 square miles (994 acres); water area is 1.15 square miles (737 acres); FIPS code is 68550 [SourceCBP]