Marion County Flag

Marion County

State:
Illinois
County Seat:
Salem

Marion County's estimated 2025 population is 36,209 with a growth rate of -0.64% in the past year according to the most recent United States census data. Marion County is the 37th largest county in Illinois. The 2010 population was 39,416 and has seen a growth of -8.14% since that time.

36,209
Total Population
63
Population Density (miĀ²)
37
Population Rank (State)
-232 -0.64%
Annual Population Growth

Marion County Population

Marion County Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Marion County includes 90.4% White, 4.22% Black or African American, and smaller percentages for other race, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Black or African American

Two or more races

Other race

Asian

Native American

Native Hawaiian or Pacific Islander

Race
Population
Percentage (of total)
White33,71490.4%
Black or African American1,5724.22%
Two or more races1,2993.48%
Other race4441.19%
Asian2510.67%
Native American70.02%
Native Hawaiian or Pacific Islander70.02%

Marion County Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Marion County's average per capita income is $43,162. Household income levels show a median of $60,839. The poverty rate stands at 16.16%.

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$91,532$108,232
Families$77,817$94,248
Households$60,839$76,720
Non Families$34,793$45,135

$43,162

Average Income

$60,839

Median Household Income

16.16%

Poverty Rate