Tinicum Township, Pennsylvania, United States [CDP]; population was 4,440 in 1990; housing units was 1,796 in 1990; location is 39°52'N 75°17'W; land area is 5.74 square miles (3,674 acres); water area is 2.97 square miles (1,898 acres); FIPS code is 76796 [SourceCBP]