Lake Fenton, Michigan, United States [CDP]; population was 4,091 in 1990; housing units was 1,671 in 1990; location is 42°51'N 83°42'W; land area is 5.48 square miles (3,509 acres); water area is 1.71 square miles (1,091 acres); FIPS code is 44520 [SourceCBP]