- Located just northeast of Harrisburg
- Latitude: 37°45'54" N (+37.7650)
- Longitude: 88°30'60" W (-88.5167)
- Elevation: 372 feet above sea level
- Public Land Survey: T. 9 S., R. 6 E., Sec. 2
- Civil township: Harrisburg
- Land area: 0.26 square miles (168.1 acres)
As the crow flies, Muddy is...
| Year | Population | Percent change |
|---|
| 1990 | 87 | -- |
| 2000 | 78 | -10.3% |