Plattsmouth, Nebraska, United States [City]; population was 6,412 in 1990; housing units was 2,495 in 1990; location is 41°0'N 95°53'W; land area is 2.66 square miles (1,699 acres); water area is 0.01 square miles (4 acres); FIPS code is 39345 [SourceCBP]