In 2022, the population of Muddy was 58, a 1.69% decrease year-by-year from 2021. Previously, in 2021, Muddy's population was 59, a decline of 1.67% compared to a population of 60 in 2020.
The median age in Muddy, IL is 53.3, as per 2021 ACS 5-Year Estimates. Of the total population, 13.89% were under the age of 15, 19.44% aged 15 to 29, 61.11% aged 30 to 64, 0.00% aged 65 to 84, and 5.56% were 85 years of age and older.