Greene County's estimated 2026 population is 11,107 with a growth rate of -1.38% in the past year according to the most recent United States census data. Greene County is the 85th largest county in Illinois. The 2010 population was 13,890 and has seen a growth of -20.04% since that time.
Data after 2023 is projected based on recent change
The racial composition of Greene County includes 96.1% White, and smaller percentages for Two or more races, Black or African American, other race, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
White (96.1%)
Two or more races (2.36%)
Black or African American (0.69%)
Other race (0.44%)
Asian (0.34%)
Native American (0.06%)
Native Hawaiian or Pacific Islander (0.02%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 11,375 | 96.1% |
| Two or more races | 279 | 2.36% |
| Black or African American | 82 | 0.69% |
| Other race | 52 | 0.44% |
| Asian | 40 | 0.34% |
| Native American | 7 | 0.06% |
| Native Hawaiian or Pacific Islander | 2 | 0.02% |
Married
Widowed
Divorced
Separated
Never Married
Greene County's average per capita income is $37,694. Household income levels show a median of $60,976. The poverty rate stands at 14.21%.
Name | Median | Mean |
|---|---|---|
| Married Families | $91,335 | - |
| Families | $74,519 | $93,840 |
| Households | $60,976 | $81,696 |
| Non Families | $32,444 | $54,331 |
Average Income
Median Household Income
Poverty Rate