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)
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%

White

Black or African American

Two or more races

Other race

Asian

Native American

Native Hawaiian or Pacific Islander

Marion County, Illinois Population by Race

Marion County, Illinois Population Pyramid 2024

Marion County, Illinois Median Age

41.3

Total

40.3

Male

42.1

Female

Marion County, Illinois Adults

There are 28,494 adults, (7,398 of whom are seniors) in Marion County, Illinois.

Marion County, Illinois Age Dependency

76.8

Age Dependency Ratio

35.1

Old Age Dependency Ratio

41.7

Child Dependency Ratio

Marion County, Illinois Sex Ratio

Female18,96450.85%
Male18,33049.15%

Marion County, Illinois Population by Age

Marion County, Illinois Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All15,4652.3674.525.5
Married7,0393.0187.612.4
Non Family5,9551.156535
Female1,8263.3556.143.9
Male6453.569.930.1

2.98

Average Family Size

2.36

Average Household Size

74.5%

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 Grade1,9017.36%
Associates Degree3,05711.83%
Bachelors Degree3,05611.83%
Graduate Degree1,4125.46%
High School Graduate9,33236.11%
Less Than 9th Grade5952.3%
Some College6,48925.11%

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
White23,70521,5343,985
Black972881146
2+ Races549507193
Hispanic42832368
Other Race34520138
Asian16212877
Islander777
Native American553

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$54,145$70,238$49,489
Graduate Degree$67,902$69,038$66,042
High School Graduate$35,840$43,623$26,475
Less Than 9th Grade$31,307$34,155$0
Overall$43,162$49,348$36,796
Some College$43,733$50,323$36,799

$43,162

Average Earnings

$49,348

Average Male

$36,796

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

97.65% of Marion County, Illinois residents speak only English, while 2.35% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 1.35% of the population.

Marion County, Illinois Language

Marion County, Illinois Poverty by Race

rate

Name
Total
In Poverty
Poverty Rate
White32,3944,63414.31%
Black1,47359140.12%
Multiple1,29628622.07%
Hispanic78425832.91%
Other43518442.3%
Asian221104.52%

16.16%

Overall Poverty Rate

13.83%

Male Poverty Rate

18.42%

Female Poverty Rate

Poverty in Marion County, Illinois

The race most likely to be in poverty in Marion County, Illinois is Other, with 42.3% below the poverty level.

The race least likely to be in poverty in Marion County, Illinois is Asian, with 4.52% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 3.07%. Among those working part-time, it was 22.49%, and for those that did not work, the poverty rate was 23.11%.

Marion County, Illinois Poverty

rate

Rate
Poverty
Less Than 9th Grade30.8%
High School17.57%
Some College10.65%
Bachelors or Greater4.48%

Marion County, Illinois Poverty Rate by Education

rate

Rate
Poverty
Female Unemployed40.73%
Male Unemployed38.75%
Female Employed10.47%
Male Employed5.75%

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

mean

median

Income by Household Type

Marion County, Illinois Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

49.3%

Overall Marriage Rate

50.5%

Male Marriage Rate

48.2%

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

2,404

Number of Veterans

2,269

Male Veterans

135

Female Veterans

War
Veterans
Vietnam881
First Gulf War560
Second Gulf War475
Korea192
World War II70

Marion County, Illinois Veterans by War

count

Age Group
Veterans
65 to 74652
75+615
35 to 54500
55 to 64482
18 to 34155

Marion County, Illinois Veterans by Age

count

Name
Veterans
% of Total
White2,2888.75%
Hispanic5411.54%
Black484.21%
2+ Races437.1%
Other Race236.37%
Native American228.57%

Marion County, Illinois Veterans by Race

Marion County, Illinois Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

5.68%

Veteran Poverty Rate

35.39%

Veteran Disability Rate

Marion County, Illinois Veterans by Education

LaborForceParticipation

60%

Labor Force Participation

56.1%

Employment Rate

6.4%

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

80.22%

Born in Marion County, Illinois

98.53%

Native Born

1.47%

Foreign Born

0.7%

Non Citizen

0.77%

Naturalized

Place of Birth

98.53% of Marion County, Illinois residents were born in the United States, with 80.22% having been born in Illinois. 0.7% 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