Marion County, Illinois Population 2024

36,441

Marion County, Illinois's estimated 2024 population is 36,441 with a growth rate of -0.63% in the past year according to the most recent United States census data. Marion County, Illinois is the 37th largest county in Illinois. The 2010 population was 39,416 and has seen a growth of -7.55% since that time.

Note: data after 2022 is projected based on recent change
Year
Population
Growth
Change
202935,281-232-0.65%
202835,513-232-0.65%
202735,745-232-0.64%
202635,977-232-0.64%
202536,209-232-0.64%
202436,441-232-0.63%
202336,673-232-0.63%
202236,905-474-1.27%
202137,379-273-0.73%
202037,6523430.92%
201937,309-144-0.38%
201837,453-304-0.81%
201737,757-300-0.79%
201638,057-324-0.84%
201538,381-192-0.5%
201438,573-112-0.29%
201338,685-333-0.85%
201239,018-129-0.33%
201139,147-269-0.68%
201039,41600%
199041,561-1,962-4.51%
198043,5234,53711.64%
197038,986-363-0.92%
196039,349-2,351-5.64%
195041,700-6,289-13.11%
194047,98912,35434.67%
193035,635-1,862-4.97%
192037,4972,4036.85%
191035,0944,64815.27%
190030,4466,10525.08%
189024,3416552.77%
188023,6863,06414.86%
187020,6227,88361.88%
186012,7396,01989.57%
18506,7201,97841.71%
18404,7422,617123.15%
18302,125-33,156-93.98%
2024 Growth Rate
-0.63% (-232)
County Seat
Salem
2020 Population
37,652
Area
573 mi²
Density
64 people/mi²
Growth Since 2020
-3.22% (-1,211)
Founded
1823

Population by Race

Race
Population
Percentage (of total)
White34,22091.15%
Black or African American1,6284.34%
Two or more races1,2313.28%
Asian2540.68%
Other race1920.51%
Native American130.03%
Native Hawaiian or Pacific Islander50.01%

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 2024

Marion County, Illinois Median Age

41.9

Total

40.7

Male

42.6

Female

Marion County, Illinois Adults

There are 28,751 adults, (7,405 of whom are seniors) in Marion County, Illinois.

Marion County, Illinois Age Dependency

75.9

Age Dependency Ratio

34.7

Old Age Dependency Ratio

41.2

Child Dependency Ratio

Marion County, Illinois Sex Ratio

Female19,02350.67%
Male18,52049.33%

Marion County, Illinois Population by Age

Marion County, Illinois Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All15,2362.4173.826.2
Married6,8123.0288.211.8
Non Family5,9081.2164.735.3
Female1,8853.5851.948.1
Male6313.5668.831.2

3.03

Average Family Size

2.41

Average Household Size

73.8%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Marion County, Illinois Households and Families

Male

Female

Education Attained
Count
Percentage
9th to 12th Grade1,9037.32%
Associates Degree2,92411.25%
Bachelors Degree2,87711.07%
Graduate Degree1,4655.64%
High School Graduate9,47836.47%
Less Than 9th Grade7032.71%
Some College6,63825.54%

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

Race
Total
High School
Bachelors
White24,01621,7443,880
Black1,024847149
Hispanic449363109
2+ Races434401180
Other Race1841060
Asian16713582
Native American11115
Islander555

The highest rate of high school graduation is among native american 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

Name
Average
Male
Female
Bachelors Degree$53,548$70,879$44,634
Graduate Degree$60,972$66,500$58,250
High School Graduate$34,273$41,036$24,700
Less Than 9th Grade$22,000$29,318$13,485
Overall$40,867$47,246$33,678
Some College$40,986$47,808$33,307

$40,867

Average Earnings

$47,246

Average Male

$33,678

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

97.98% of Marion County, Illinois residents speak only English, while 2.02% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 1.18% of the population.

Marion County, Illinois Language

Marion County, Illinois Poverty by Race

rate

Name
Total
In Poverty
Poverty Rate
White32,8075,17215.76%
Black1,50450533.58%
Hispanic82027433.41%
Multiple1,19927222.69%
Other1844021.74%
Asian2383916.39%

16.96%

Overall Poverty Rate

13.82%

Male Poverty Rate

20.02%

Female Poverty Rate

Poverty in Marion County, Illinois

The race most likely to be in poverty in Marion County, Illinois is Black, with 33.58% below the poverty level.

The race least likely to be in poverty in Marion County, Illinois is White, with 15.76% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.74%. Among those working part-time, it was 24.25%, and for those that did not work, the poverty rate was 22.25%.

Marion County, Illinois Poverty

rate

Rate
Poverty
Less Than 9th Grade30.66%
High School18.22%
Some College11.24%
Bachelors or Greater4.61%

Marion County, Illinois Poverty Rate by Education

rate

Rate
Poverty
Female Unemployed50.88%
Male Unemployed43.19%
Female Employed11.97%
Male Employed5.01%

Marion County, Illinois Poverty Rate by Employment Status and Sex

Marion County, Illinois Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

Name
Median
Mean
Families$75,241$87,978
Households$59,099$73,326
Married Families$88,762$101,300
Non Families$35,412$46,702

mean

median

Income by Household Type

Marion County, Illinois Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

47.3%

Overall Marriage Rate

48.9%

Male Marriage Rate

45.8%

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

2,591

Number of Veterans

2,471

Male Veterans

120

Female Veterans

War
Veterans
Vietnam1,015
First Gulf War623
Second Gulf War429
Korea184
World War II76

Marion County, Illinois Veterans by War

count

Age Group
Veterans
65 to 74787
75+654
35 to 54559
55 to 64460
18 to 34131

Marion County, Illinois Veterans by Age

count

Name
Veterans
% of Total
White2,4959.36%
Hispanic9017.96%
2+ Races367.38%
Black342.86%
Other Race2010.87%
Native American646.15%

Marion County, Illinois Veterans by Race

Marion County, Illinois Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

4.45%

Veteran Poverty Rate

33.5%

Veteran Disability Rate

Marion County, Illinois Veterans by Education

LaborForceParticipation

60.3%

Labor Force Participation

55.3%

Employment Rate

8.1%

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

80.73%

Born in Marion County, Illinois

98.67%

Native Born

1.33%

Foreign Born

0.67%

Non Citizen

0.66%

Naturalized

Place of Birth

98.67% of Marion County, Illinois residents were born in the United States, with 80.73% having been born in Illinois. 0.67% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Marion County, Illinois Place of Birth

Sources