South Sioux City, Nebraska, United States [City]; population was 9,677 in 1990; housing units was 3,816 in 1990; location is 42°28'N 96°25'W; land area is 4.66 square miles (2,984 acres); water area is 0.30 square miles (191 acres); FIPS code is 46030 [SourceCBP]