Marion County, Illinois Population 2023

37,216

Marion County, Illinois's estimated 2023 population is 37,216 with a growth rate of -0.46% in the past year according to the most recent United States census data. Marion County, Illinois is the 36th largest county in Illinois. The 2010 population was 39,437 and has seen a growth of -5.63% since that time.

Note: data after 2021 is projected based on recent change

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Year
Population
Growth
Growth Rate
201039,437
201139,266-171-0.43%
201239,095-171-0.44%
201338,924-171-0.44%
201438,753-171-0.44%
201538,582-171-0.44%
201638,411-171-0.44%
201738,240-171-0.45%
201838,069-171-0.45%
201937,898-171-0.45%
202037,729-169-0.45%
202137,558-171-0.45%
202237,387-171-0.46%
202337,216-171-0.46%
showing: 14 rows
2023 Growth Rate
-0.46% (-171)
Founded
1823
County Seat
Salem
2010 Population
39,437
Growth Since 2010
-5.63% (-2,221)

Marion County, Illinois Population 2023

Population by Race

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Race
Population
Percentage (of total)
White34,75191.98%
Black or African American1,4363.8%
Two or more races1,1483.04%
Asian2310.61%
Other race2030.54%
Native American90.02%
Native Hawaiian or Pacific Islander30.01%
showing: 7 rows

White

Black or African American

Two or more races

Asian

Other race

Native American

Native Hawaiian or Pacific Islander

Marion County, Illinois Population by Race

Marion County, Illinois Population Pyramid 2023

Marion County, Illinois Median Age

42.1

Total

41

Male

42.7

Female

Marion County, Illinois Adults

There are 28,889 adults, (7,320 of whom are seniors) in Marion County, Illinois.

Marion County, Illinois Age Dependency

75.2

Age Dependency Ratio

33.9

Old Age Dependency Ratio

41.2

Child Dependency Ratio

Marion County, Illinois Sex Ratio

Female19,25150.95%
Male18,53049.05%

Marion County, Illinois Population by Age

Marion County, Illinois Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All15,2942.4274.725.3
Married6,7863.0689.410.6
Non Family5,9631.216832
Female1,8883.651.448.6
Male6573.4150.549.5
showing: 5 rows

3.04

Average Family Size

2.42

Average Household Size

74.7%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Marion County, Illinois Households and Families

Male

Female

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Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

Marion County, Illinois Educational Attainment by Sex (over 25)

Marion County, Illinois Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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The highest rate of high school graduation is among islander people with a rate of 100%.

The highest rate of bachelors degrees is among islander people with a rate of 100%.

Marion County, Illinois Educational Attainment by Race

All

Male

Female

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$36,315

Average Earnings

$42,592

Average Male

$30,189

Average Female

Marion County, Illinois Earnings by Educational Attainment

Marion County, Illinois Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Marion County, Illinois Language

98.38% of Marion County, Illinois residents speak only English, while 1.62% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 0.83% of the population.

Marion County, Illinois Language

Marion County, Illinois Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
White33,3395,31615.95%
Black1,30137328.67%
Multiple1,10623621.34%
Hispanic75323531.21%
Asian2175927.19%
Other1963417.35%
showing: 6 rows

16.88%

Overall Poverty Rate

14.03%

Male Poverty Rate

19.6%

Female Poverty Rate

Poverty in Marion County, Illinois

The race most likely to be in poverty in Marion County, Illinois is Hispanic, with 31.21% below the poverty level.

The race least likely to be in poverty in Marion County, Illinois is White, with 15.95% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.51%. Among those working part-time, it was 25.19%, and for those that did not work, the poverty rate was 19.89%.

Marion County, Illinois Poverty

rate

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Rate
Poverty
Less Than 9th Grade32.23%
High School15.55%
Some College11.36%
Bachelors or Greater4.95%
showing: 4 rows

Marion County, Illinois Poverty Rate by Education

rate

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Rate
Poverty
Female Unemployed47.71%
Male Unemployed41.75%
Female Employed12.54%
Male Employed4.58%
showing: 4 rows

Marion County, Illinois Poverty Rate by Employment Status and Sex

Marion County, Illinois Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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mean

median

Income by Household Type

Marion County, Illinois Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

46.9%

Overall Marriage Rate

48.3%

Male Marriage Rate

45.5%

Female Marriage Rate

Marion County, Illinois Married by Age and Sex

male

female

Marion County, Illinois Marriage

The age group where males are most likely to be married is 45-54, while the female age group most likely to be married is 45-54.

Marion County, Illinois Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Marion County, Illinois Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

2,596

Number of Veterans

2,438

Male Veterans

158

Female Veterans

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Marion County, Illinois Veterans by War

count

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Marion County, Illinois Veterans by Age

count

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Marion County, Illinois Veterans by Race

Marion County, Illinois Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

4.59%

Veteran Poverty Rate

35.03%

Veteran Disability Rate

Marion County, Illinois Veterans by Education

LaborForceParticipation

60.2%

Labor Force Participation

54.7%

Employment Rate

9%

Unemployment Rate

Marion County, Illinois Employment by Age

LaborForceParticipation

Marion County, Illinois Employment by Race

LaborForceParticipation

Marion County, Illinois Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

83.98%

Born in Marion County, Illinois

102.28%

Native Born

1.04%

Foreign Born

0.45%

Non Citizen

0.59%

Naturalized

Place of Birth

102.28% of Marion County, Illinois residents were born in the United States, with 83.98% having been born in Illinois. 0.45% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Marion County, Illinois Place of Birth

Sources