Muddy is a small incorporated village located in the Harrisburg Township in Saline County, Illinois, United States.

This church was attended by eastern European immigrants, including Russians, Slovaks, Poles, and Rusyns,.

[9] The village lies along U.S. Route 45 northeast of Harrisburg and southwest of Eldorado.

The Middle Fork of the Saline River flows just southwest of Muddy.

38.2% of all households were made up of individuals, and 8.8% had someone living alone who was 65 years of age or older.

There were no families and 7.7% of the population living below the poverty line, including no under eighteens and none of those over 64.