Mercer County, Illinois Population 2024

15,441

Mercer County, Illinois's estimated 2024 population is 15,441 with a growth rate of -0.3% in the past year according to the most recent United States census data. Mercer County, Illinois is the 68th largest county in Illinois. The 2010 population was 16,410 and has seen a growth of -5.9% since that time.

Note: data after 2022 is projected based on recent change

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Year
Population
Growth
Growth Rate
202915,211-46-0.3%
202815,257-46-0.3%
202715,303-46-0.3%
202615,349-46-0.3%
202515,395-46-0.3%
202415,441-46-0.3%
202315,487-46-0.3%
202215,533-47-0.3%
202115,580-52-0.33%
202015,6321420.92%
201915,490-82-0.53%
201815,572-46-0.29%
201715,61870.04%
201615,611-137-0.87%
201515,748-154-0.97%
201415,902-175-1.09%
201316,077-88-0.54%
201216,165-155-0.95%
201116,320-90-0.55%
201016,41000%
199017,290-1,996-10.35%
198019,2861,99211.52%
197017,2941450.85%
196017,149-225-1.3%
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%
183026-15,185-99.83%
showing: 37 rows
2024 Growth Rate
-0.3% (-46)
County Website
Mercer County
County Seat
2020 Population
15,632
Area
561 mi²
Density
28 people/mi²
Growth Since 2020
-1.22% (-191)
Founded
January 13, 1825

Mercer County, Illinois Population 2024

Population by Race

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Race
Population
Percentage (of total)
White14,96195.34%
Two or more races4642.96%
Other race970.62%
Black or African American960.61%
Asian740.47%
Native American00%
Native Hawaiian or Pacific Islander00%

White

Two or more races

Other race

Black or African American

Asian

Native American

Native Hawaiian or Pacific Islander

Mercer County, Illinois Population by Race

Mercer County, Illinois Population Pyramid 2024

Mercer County, Illinois Median Age

44.7

Total

44.2

Male

45.3

Female

Mercer County, Illinois Adults

There are 12,426 adults, (3,381 of whom are seniors) in Mercer County, Illinois.

Mercer County, Illinois Age Dependency

73.5

Age Dependency Ratio

37.4

Old Age Dependency Ratio

36.1

Child Dependency Ratio

Mercer County, Illinois Sex Ratio

Female7,74149.33%
Male7,95150.67%

Mercer County, Illinois Population by Age

Mercer County, Illinois Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All6,4352.4179.520.5
Married3,8102.9688.811.2
Non Family1,9681.1363.736.3
Female420360.239.8
Male2373.1994.55.5

2.92

Average Family Size

2.41

Average Household Size

79.5%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Mercer County, Illinois Households and Families

Male

Female

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Education Attained
Count
Percentage
Less Than 9th Grade2302.05%
9th to 12th Grade6205.52%
High School Graduate4,40439.21%
Some College2,73724.37%
Associates Degree1,23210.97%
Bachelors Degree1,28511.44%
Graduate Degree7236.44%

Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

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

Mercer County, Illinois Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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Race
Total
High School
Bachelors
White10,7439,9531,854
Hispanic24720660
2+ Races21117967
Black70554
Other Race50390
Asian464639

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

The highest rate of bachelors degrees is among asian people with a rate of 84.78%.

Mercer County, Illinois Educational Attainment by Race

All

Male

Female

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Name
Average
Male
Female
Overall$43,720$57,823$34,592
Less Than 9th Grade$28,313$35,000$24,141
High School Graduate$39,907$53,483$31,039
Some College$41,338$60,393$32,778
Bachelors Degree$58,246$80,547$48,984
Graduate Degree$71,711$66,875$73,047

$43,720

Average Earnings

$57,823

Average Male

$34,592

Average Female

Mercer County, Illinois Earnings by Educational Attainment

Mercer County, Illinois Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Mercer County, Illinois Language

97.45% of Mercer County, Illinois residents speak only English, while 2.55% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 1.68% of the population.

Mercer County, Illinois Language

Mercer County, Illinois Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
White14,6851,1227.64%
Multiple4416614.97%
Hispanic4125212.62%
Black413278.05%
Other892123.6%

8.02%

Overall Poverty Rate

5.93%

Male Poverty Rate

10.16%

Female Poverty Rate

Poverty in Mercer County, Illinois

The race most likely to be in poverty in Mercer County, Illinois is Black, with 78.05% below the poverty level.

The race least likely to be in poverty in Mercer County, Illinois is White, with 7.64% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.61%. Among those working part-time, it was 12.76%, and for those that did not work, the poverty rate was 11.68%.

Mercer County, Illinois Poverty

rate

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Rate
Poverty
Less Than 9th Grade15.64%
High School8.49%
Some College5.37%
Bachelors or Greater4%

Mercer County, Illinois Poverty Rate by Education

rate

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Rate
Poverty
Female Unemployed37.5%
Male Unemployed18.93%
Female Employed5.44%
Male Employed3.01%

Mercer County, Illinois Poverty Rate by Employment Status and Sex

Mercer County, Illinois Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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Name
Median
Mean
Households$67,028$82,414
Families$84,315$97,649
Married Families$91,025$-999,999,999
Non Families$35,257$44,873

mean

median

Income by Household Type

Mercer County, Illinois Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

60.4%

Overall Marriage Rate

59.6%

Male Marriage Rate

61.1%

Female Marriage Rate

Mercer County, Illinois Married by Age and Sex

male

female

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 45-54.

Mercer County, Illinois Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Mercer County, Illinois Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

1,068

Number of Veterans

1,026

Male Veterans

42

Female Veterans

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War
Veterans
Vietnam484
Second Gulf War265
First Gulf War160
Korea85
World War II41

Mercer County, Illinois Veterans by War

count

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Age Group
Veterans
75+371
65 to 74277
35 to 54254
18 to 3497
55 to 6469

Mercer County, Illinois Veterans by Age

count

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Name
Veterans
% of Total
White1,0418.74%
2+ Races279.31%
Hispanic30.99%

Mercer County, Illinois Veterans by Race

Mercer County, Illinois Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

3.77%

Veteran Poverty Rate

37.68%

Veteran Disability Rate

Mercer County, Illinois Veterans by Education

LaborForceParticipation

59.8%

Labor Force Participation

57.8%

Employment Rate

3.3%

Unemployment Rate

Mercer County, Illinois Employment by Age

LaborForceParticipation

Mercer County, Illinois Employment by Race

LaborForceParticipation

Mercer 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

70.05%

Born in Mercer County, Illinois

98.88%

Native Born

1.12%

Foreign Born

0.22%

Non Citizen

0.9%

Naturalized

Place of Birth

98.88% of Mercer County, Illinois residents were born in the United States, with 70.05% having been born in Illinois. 0.22% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Mercer County, Illinois Place of Birth

Sources