Marion County, Illinois Population 2021

Marion County, Illinois's estimated population is 36,853 with a growth rate of -0.48% in the past year according to the most recent United States census data. Marion County, Illinois is the 39th largest county in Illinois. The 2010 Population was 39,416 and has seen a growth of -6.50% since this time.

Note: 2020 and 2021 data is projected
Year Population Growth Growth Rate
202136,853-176-0.48%
202037,029-176-0.47%
201937,205-176-0.47%
201837,381-345-0.91%
201737,726-319-0.84%
201638,045-314-0.82%
201538,359-196-0.51%
201438,555-114-0.29%
201338,669-339-0.87%
201239,008-133-0.34%
201139,141-275-0.70%
201039,416-2,145-5.16%
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%
18302,1250.00%
2021 Growth Rate
-0.48%
Founded
1823
County Seat
2010 Population
39,416
Growth Since 2010
-6.50%
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Marion County, Illinois Population Growth

Population by Race

Race Population Percentage
White34,90292.47%
Black or African American1,3823.66%
Two or More Races9602.54%
Asian2430.64%
Some Other Race1750.46%
American Indian and Alaska Native810.21%
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Marion County, Illinois Population by Race

Marion County, Illinois Population Pyramid $2021

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Marion County, Illinois Median Age

42.2


Total

40.7


Male

43.5


Female

Marion County, Illinois Adults

There are 29,068 adults, (7,288 of whom are seniors) in Marion County, Illinois.

Marion County, Illinois Age Dependency

73.3

Age Dependency Ratio

33.5

Old Age Dependency Ratio

39.8

Child Dependency Ratio

Marion County, Illinois Sex Ratio

Female

19,130

50.68%

Male

18,613

49.32%

Marion County, Illinois Population by Age

Marion County, Illinois Renter vs Owner Occupied by Household Type

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Marion County, Illinois Household Types

Type Owner Renter
Married89.5%10.5%
All73.6%26.4%
Non Family64.4%35.6%
Male52.5%47.5%
Female49.7%50.3%

73.6%

Rate of Home Ownership

Marion County, Illinois Households and Families

Type Count Average Size Owned
All15,9462.3273.6
Married7,3052.9189.5
Non Family5,9661.1964.4
Female1,9653.1949.7
Male7103.3152.5

2.87

Average Family Size

2.32

Average Household Size

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Marion County, Illinois Households by Type

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Education Attained Count Percentage
Less Than 9th Grade1,0173.88%
9th to 12th Grade1,8787.16%
High School Graduate9,23135.18%
Some College7,02126.76%
Associates Degree3,11011.85%
Bachelors Degree2,5759.81%
Graduate Degree1,4045.35%
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Marion County, Illinois Educational Attainment by Sex (over 25)

Marion County, Illinois Educational Attainment by Race

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Race Total High School Bachelors
White24,43421,7533,627
Black90473376
Hispanic36635645
2+ Races28526954
Asian192191130
Other Race15915641
Native American685221

The highest rate of high school graduation is among asian people with a rate of 99.48%.

The highest rate of bachelors degrees is among asian people with a rate of 67.71%.

Marion County, Illinois Educational Attainment by Race

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Name Average Male Female
Overall$32,728$40,869$26,657
Less Than 9th Grade$16,952$18,958$14,125
High School Graduate$30,095$38,388$22,781
Some College$32,169$42,500$26,618
Bachelors Degree$45,408$51,797$42,679
Graduate Degree$51,875$57,500$47,708

$32,728

Average Earnings

$40,869

Average Male

$26,657

Average Female

Marion County, Illinois Earnings by Educational Attainment

Marion County, Illinois Language by Age

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Marion County, Illinois Language

98.34% of Marion County, Illinois residents speak only English, while 1.66% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 0.70% of the population.

Marion County, Illinois Language

Marion County, Illinois Poverty by Race

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Name Total In Poverty Poverty Rate
White33,4845,45716.30%
Black1,32237928.67%
Multiple91525828.20%
Hispanic67724636.34%
Asian23512452.77%
Other1754827.43%
Native811619.75%

17.73%

Overall Poverty Rate

15.87%

Male Poverty Rate

19.53%

Female Poverty Rate

Poverty in Marion County, Illinois

The race most likely to be in poverty in Marion County, Illinois is Asian, with 52.77% below the poverty level.

The race least likely to be in poverty in Marion County, Illinois is White, with 16.30% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 3.28%. Among those working part-time, it was 23.40%, and for those that did not work, the poverty rate was 20.96%.

Marion County, Illinois Poverty

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Name Poverty
Less Than 9th Grade30.64%
High School13.73%
Some College11.93%
Bachelors or Greater5.92%

Marion County, Illinois Poverty Rate by Education

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Rate Poverty
Female Unemployed48.63%
Male Unemployed37.55%
Female Employed12.16%
Male Employed5.55%

Marion County, Illinois Poverty Rate by Employment Status and Sex

Marion County, Illinois Income by Household Type

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Name Median Mean
Households$47,519$60,262
Families$60,645$70,848
Married Families$71,608$82,511
Non Families$28,275$38,927
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Income by Household Type

Marion County, Illinois Marital Status

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Marriage Rates

49.5%

Overall Marriage Rate

51.3%

Male Marriage Rate

47.8%

Female Marriage Rate

Marion County, Illinois Married by Age and Sex

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Marion County, Illinois Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 45-54.

Marion County, Illinois Marital Status by Race

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Marion County, Illinois Marital Status

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2,688

Number of Veterans

2,535

Male Veterans

153

Female Veterans

War Veterans
Vietnam1,180
First Gulf War389
Second Gulf War249
Korea227
World War II119

Marion County, Illinois Veterans by War

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Age Group Veterans
65 to 74908
75+721
35 to 54492
55 to 64435
18 to 34132

Marion County, Illinois Veterans by Age

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Name Veterans % of Total
White2,5159.26%
Black928.82%
Hispanic5712.10%
Other Race3522.01%
2+ Races245.99%
Native American2228.95%

Marion County, Illinois Veterans by Race

Marion County, Illinois Veterans by Education

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6.87%

Veteran Poverty Rate

34.23%

Veteran Disability Rate

Marion County, Illinois Veterans by Education

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60.1%

Labor Force Participation

54.3%

Employment Rate

9.5%

Unemployment Rate

Marion County, Illinois Employment by Age

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Marion County, Illinois Employment by Race

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Marion County, Illinois Employment by Education

Origin of Non-Citizens

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

Origin of Naturalized Citizens

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82.90%

Born in Marion County, Illinois

98.83%

Native Born

1.17%

Foreign Born

0.62%

Non Citizen

0.54%

Naturalized

Place of Birth

98.83% of Marion County, Illinois residents were born in the United States, with 82.90% having been born in Illinois. 0.62% 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

  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990

Sources