Mercer County Flag

Mercer County

State:
Illinois
County Seat:
Aledo

Mercer County's estimated 2025 population is 15,395 with a growth rate of -0.3% in the past year according to the most recent United States census data. Mercer County is the 68th largest county in Illinois. The 2010 population was 16,410 and has seen a growth of -6.19% since that time.

15,395
Total Population
27
Population Density (miĀ²)
68
Population Rank (State)
-46 -0.3%
Annual Population Growth

Mercer County Population

Mercer County Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Mercer County includes 94.77% White, and smaller percentages for other race, Black or African American, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Two or more races

Other race

Black or African American

Asian

Native American

Native Hawaiian or Pacific Islander

Race
Population
Percentage (of total)
White14,80294.77%
Two or more races5263.37%
Other race1370.88%
Black or African American880.56%
Asian520.33%
Native American140.09%
Native Hawaiian or Pacific Islander00%

Mercer County Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Mercer County's average per capita income is $46,580. Household income levels show a median of $71,710. The poverty rate stands at 7.88%.

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$99,395-
Families$92,255$103,025
Households$71,710$87,773
Non Families$38,039$48,730

$46,580

Average Income

$71,710

Median Household Income

7.88%

Poverty Rate