Zelienople, Pennsylvania, United States [Borough]; population was 4,158 in 1990; housing units was 1,838 in 1990; location is 40°47'N 80°9'W; land area is 2.13 square miles (1,364 acres); water area is 0.04 square miles (26 acres); FIPS code is 87272 [SourceCBP]