Shelby County's estimated 2026 population is 20,598 with a growth rate of 0.11% 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 -7.86% since that time.
Data after 2023 is projected based on recent change
Overall: 45.3 years
Female: 46.7 years
Male: 44.1 years
There are 16,308 adults, (4,905 of whom are seniors) in Shelby County.
Female: 10,447 (50.4%)
Male: 10,273 (49.6%)
The racial composition of Shelby County includes 96.55% White, and smaller percentages for Two or more races, other race, Native American, Black or African American, Asian and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 20,005 | 96.55% |
| Two or more races | 480 | 2.32% |
| Other race | 87 | 0.42% |
| Native American | 65 | 0.31% |
| Black or African American | 45 | 0.22% |
| Asian | 38 | 0.18% |
Shelby County's average per capita income is $46,771. Household income levels show a median of $72,095. The poverty rate stands at 9.15%.
Name | Median | Mean |
|---|---|---|
| Married Families | $98,627 | - |
| Families | $86,663 | $96,724 |
| Households | $72,095 | $82,841 |
| Non Families | $38,158 | $48,534 |
Average Income
Median Household Income
Poverty Rate