Walnut Hill is a village located in Marion County, Illinois. Walnut Hill has a 2026 population of 91. Walnut Hill is currently declining at a rate of -1.09% annually and its population has decreased by -5.21% since the most recent census, which recorded a population of 96 in 2020.
The median age in Walnut Hill is 50.7 years: 39.7 years for males, and 59.5 years for females. For every 100 females there are 108.2 males.
Data after 2023 is projected based on recent change
Overall: 50.7 years
Female: 59.5 years
Male: 39.7 years
There are 96 adults, (35 of whom are seniors) in Walnut Hill.
Female: 61 (48%)
Male: 66 (52%)
The racial composition of Walnut Hill includes 100% White, and smaller percentages for and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 127 | 100% |