Mercer County, Illinois Population 2021

Mercer County, Illinois's estimated population is 15,209 with a growth rate of -0.74% in the past year according to the most recent United States census data. Mercer County, Illinois is the 73rd largest county in Illinois. The 2010 Population was 16,409 and has seen a growth of -7.31% since this time.

Note: 2020 and 2021 data is projected
Year Population Growth Growth Rate
202115,209-114-0.74%
202015,323-114-0.74%
201915,437-114-0.73%
201815,551-57-0.37%
201715,60860.04%
201615,602-144-0.91%
201515,746-155-0.97%
201415,901-174-1.08%
201316,075-88-0.54%
201216,163-153-0.94%
201116,316-93-0.57%
201016,409-881-5.10%
199017,290-1,996-10.35%
198019,2861,99211.52%
197017,2941450.85%
196017,149-225-1.30%
195017,374-327-1.85%
194017,7011,0606.37%
193016,641-2,159-11.48%
192018,800-923-4.68%
191019,723-1,222-5.83%
190020,9452,40012.94%
189018,545-957-4.91%
188019,5027333.91%
187018,7693,72724.78%
186015,0429,796186.73%
18505,2462,894123.04%
18402,3522,3268946.15%
1830260.00%
2021 Growth Rate
-0.74%
County Website
Founded
January 13, 1825
County Seat
2010 Population
16,409
Growth Since 2010
-7.31%
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Mercer County, Illinois Population Growth

Population by Race

Race Population Percentage
White15,12897.04%
Two or More Races2351.51%
Black or African American980.63%
Asian650.42%
Some Other Race480.31%
American Indian and Alaska Native150.10%
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Mercer County, Illinois Population by Race

Mercer County, Illinois Population Pyramid $2021

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Mercer County, Illinois Median Age

44.9


Total

43.9


Male

45.9


Female

Mercer County, Illinois Adults

There are 12,225 adults, (3,284 of whom are seniors) in Mercer County, Illinois.

Mercer County, Illinois Age Dependency

74.4

Age Dependency Ratio

36.7

Old Age Dependency Ratio

37.6

Child Dependency Ratio

Mercer County, Illinois Sex Ratio

Female

7,797

50.02%

Male

7,792

49.98%

Mercer County, Illinois Population by Age

Mercer County, Illinois Renter vs Owner Occupied by Household Type

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Mercer County, Illinois Household Types

Type Owner Renter
Married90.6%9.4%
All79%21%
Male71.2%28.8%
Non Family63.6%36.4%
Female61.5%38.5%

79.0%

Rate of Home Ownership

Mercer County, Illinois Households and Families

Type Count Average Size Owned
All6,5162.3679
Married3,6962.9290.6
Non Family2,1321.1763.6
Female4522.9861.5
Male2363.2171.2

2.9

Average Family Size

2.36

Average Household Size

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Mercer County, Illinois Households by Type

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Education Attained Count Percentage
Less Than 9th Grade1901.71%
9th to 12th Grade7096.37%
High School Graduate4,40839.59%
Some College2,84325.53%
Associates Degree1,0519.44%
Bachelors Degree1,27611.46%
Graduate Degree6585.91%
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Mercer County, Illinois Educational Attainment by Sex (over 25)

Mercer County, Illinois Educational Attainment by Race

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Race Total High School Bachelors
White10,7719,9331,830
Hispanic17515260
Black76575
2+ Races715825
Asian353513
Other Race2020
Native American1261

The highest rate of high school graduation is among asian people with a rate of 100.00%.

The highest rate of bachelors degrees is among asian people with a rate of 37.14%.

Mercer County, Illinois Educational Attainment by Race

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Name Average Male Female
Overall$39,156$50,221$27,798
Less Than 9th Grade$33,636$36,250$23,625
High School Graduate$37,152$46,985$21,085
Some College$36,498$51,897$26,622
Bachelors Degree$49,509$65,583$43,017
Graduate Degree$55,476$68,750$49,931

$39,156

Average Earnings

$50,221

Average Male

$27,798

Average Female

Mercer County, Illinois Earnings by Educational Attainment

Mercer County, Illinois Language by Age

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Mercer County, Illinois Language

98.66% of Mercer County, Illinois residents speak only English, while 1.34% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 0.61% of the population.

Mercer County, Illinois Language

Mercer County, Illinois Poverty by Race

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Name Total In Poverty Poverty Rate
White14,6831,4099.60%
Multiple2303314.35%
Black522140.38%
Hispanic379133.43%
Native15640.00%

9.65%

Overall Poverty Rate

8.32%

Male Poverty Rate

10.98%

Female Poverty Rate

Poverty in Mercer County, Illinois

The race most likely to be in poverty in Mercer County, Illinois is Black, with 40.38% below the poverty level.

The race least likely to be in poverty in Mercer County, Illinois is Hispanic, with 3.43% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.82%. Among those working part-time, it was 9.61%, and for those that did not work, the poverty rate was 13.18%.

Mercer County, Illinois Poverty

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Name Poverty
Less Than 9th Grade11.29%
High School9.39%
Some College5.82%
Bachelors or Greater4.40%

Mercer County, Illinois Poverty Rate by Education

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Rate Poverty
Female Unemployed58.16%
Male Unemployed20.87%
Female Employed5.62%
Male Employed3.64%

Mercer County, Illinois Poverty Rate by Employment Status and Sex

Mercer County, Illinois Income by Household Type

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Name Median Mean
Households$59,787$69,351
Families$74,262$83,155
Married Families$80,900-
Non Families$33,880$39,133
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Income by Household Type

Mercer County, Illinois Marital Status

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Marriage Rates

58.7%

Overall Marriage Rate

58.4%

Male Marriage Rate

59.0%

Female Marriage Rate

Mercer County, Illinois Married by Age and Sex

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Mercer 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 35-44.

Mercer County, Illinois Marital Status by Race

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Mercer County, Illinois Marital Status

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1,223

Number of Veterans

1,107

Male Veterans

116

Female Veterans

War Veterans
Vietnam514
Second Gulf War175
First Gulf War161
Korea113
World War II75

Mercer County, Illinois Veterans by War

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Age Group Veterans
75+385
65 to 74336
35 to 54278
55 to 64170
18 to 3454

Mercer County, Illinois Veterans by Age

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Name Veterans % of Total
White1,20210.06%
Black1821.18%
Native American216.67%
2+ Races11.10%

Mercer County, Illinois Veterans by Race

Mercer County, Illinois Veterans by Education

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4.41%

Veteran Poverty Rate

30.26%

Veteran Disability Rate

Mercer County, Illinois Veterans by Education

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62.3%

Labor Force Participation

59.5%

Employment Rate

4.4%

Unemployment Rate

Mercer County, Illinois Employment by Age

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Mercer County, Illinois Employment by Race

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Mercer 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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72.72%

Born in Mercer County, Illinois

98.96%

Native Born

1.04%

Foreign Born

0.17%

Non Citizen

0.87%

Naturalized

Place of Birth

98.96% of Mercer County, Illinois residents were born in the United States, with 72.72% having been born in Illinois. 0.17% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Mercer 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