Muddy, Illinois, United States [Village]; population was 87 in 1990; housing units was 47 in 1990; location is 37°46'N 88°31'W; land area is 0.15 square miles (95 acres); FIPS code is 51271 [SourceCBP]
Muddy, Montana, United States [CDP]; population was 387 in 1990; housing units was 124 in 1990; location is 45°35'N 106°48'W; land area is 28.39 square miles (18,168 acres); FIPS code is 52315 [SourceCBP]