Shelby County Flag

Shelby County

State:
Illinois
County Seat:
Shelbyville

Shelby County's estimated 2025 population is 20,284 with a growth rate of -0.7% in the past year according to the most recent United States census data. Shelby County is the 57th largest county in Illinois. The 2010 population was 22,354 and has seen a growth of -9.26% since that time.

20,284
Total Population
27
Population Density (mi²)
57
Population Rank (State)
-142 -0.7%
Annual Population Growth

Shelby County Population

Shelby County Population

Data after 2023 is projected based on recent change

Demographics

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.

Population by Race

White

Two or more races

Native American

Other race

Asian

Black or African American

Native Hawaiian or Pacific Islander

Race
Population
Percentage (of total)
White20,20096.8%
Two or more races4011.92%
Native American920.44%
Other race800.38%
Asian600.29%
Black or African American240.12%
Native Hawaiian or Pacific Islander100.05%

Shelby County Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

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%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median
Mean
Married Families$95,322-
Families$84,015$93,274
Households$68,457$79,115
Non Families$39,884$47,878

$46,342

Average Income

$68,457

Median Household Income

9.95%

Poverty Rate