Shelby County's estimated 2026 population is 20,440 with a growth rate of -0.25% in the past year according to the most recent United States census data. Shelby County is the 56th largest county in Illinois. The 2010 population was 22,354 and has seen a growth of -8.56% since that time.
Data after 2023 is projected based on recent change
The racial composition of Shelby County includes 96.8% White, and smaller percentages for Two or more races, Native American, other race, Asian, Black or African American, Native Hawaiian or Pacific Islander and multiracial populations.
White (96.8%)
Two or more races (1.92%)
Native American (0.44%)
Other race (0.38%)
Asian (0.29%)
Black or African American (0.12%)
Native Hawaiian or Pacific Islander (0.05%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 20,200 | 96.8% |
| Two or more races | 401 | 1.92% |
| Native American | 92 | 0.44% |
| Other race | 80 | 0.38% |
| Asian | 60 | 0.29% |
| Black or African American | 24 | 0.12% |
| Native Hawaiian or Pacific Islander | 10 | 0.05% |
Married
Widowed
Divorced
Separated
Never Married
Shelby County's average per capita income is $46,342. Household income levels show a median of $68,457. The poverty rate stands at 9.95%.
Name | Median | Mean |
|---|---|---|
| Married Families | $95,322 | - |
| Families | $84,015 | $93,274 |
| Households | $68,457 | $79,115 |
| Non Families | $39,884 | $47,878 |
Average Income
Median Household Income
Poverty Rate