Mercer County, IL

County

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2024 Population

15,495

US Senator

Dick Durbin

Democratic Party

US Senator

Tammy Duckworth

Democratic Party

2024 Median Age

44.7

0.449% 1-year increase

2024 Poverty Rate

8.92%

13.2% 1-year increase

2024 Median Household Income

$74,182

3.45% 1-year growth

2024 Median Property Value

$146,700

5.31% 1-year growth

2024 Employed Population

7,407

0.122% 1-year growth

About

None of the households in Mercer County, IL reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.

99.7% of the residents in Mercer County, IL are U.S. citizens.

In 2024, the median property value in Mercer County, IL was $146,700, and the homeownership rate was 83.8%.

Most people in Mercer County, IL drove alone to work, and the average commute time was 28.1 minutes. The average car ownership in Mercer County, IL was 2 cars per household.

Mercer County, IL borders Henderson County, IL, Henry County, IL, Knox County, IL, Rock Island County, IL, Warren County, IL, Des Moines County, IA, and Louisa County, IA.

United States Illinois Davenport-Moline-Rock Island, IA-IL

Population & Diversity

Mercer County, IL is home to a population of 15.5k people, from which 99.7% are citizens. As of 2024, 1.07% of Mercer County, IL residents were born outside of the country (166 people).

In 2024, there were 56.6 times more White (Non-Hispanic) residents (14.4k people) in Mercer County, IL than any other race or ethnicity. There were 255 Two Races Excluding Other, & Three or More Races (Non-Hispanic) and 170 Other (Hispanic) residents, the second and third most common ethnic groups.

Population & Diversity

Citizenship

99.7%

2024 Citizenship

99.7%

2023 Citizenship

As of 2024, 99.7% of Mercer County, IL residents were US citizens, which is higher than the national average of 93.2%. In 2023, the percentage of US citizens in Mercer County, IL was 99.7%, meaning that the rate of citizenship has been decreasing.

The following chart shows US citizenship percentages in Mercer County, IL compared to that of it's neighboring and parent geographies.

Diversity

Race and Ethnicity

The 3 largest ethnic groups in Mercer County, IL

White (Non-Hispanic)
14.4k ± 64
Two Races Excluding Other, & Three or More Races (Non-Hispanic)
255 ± 58
Other (Hispanic)
170 ± 58

3.45%

Hispanic Population

534 people

3.45% of the people in Mercer County, IL are hispanic (534 people).

The following chart shows the 8 races represented in Mercer County, IL as a share of the total population.

Global Diversity

The PUMS dataset is not available at the County level, so we are showing data for Illinois.

Most Common Origin

Mexico
633,244 ± 19,044 people
India
161,770 ± 9,812 people
Poland
119,556 ± 8,449 people

In 2023, the most common birthplace for the foreign-born residents of Illinois was Mexico, the natal country of 633,244 Illinois residents, followed by India with 161,770 and Poland with 119,556.

Foreign-Born Population

1.07%

2024 Foreign-Born Population

166 people

1.1%

2023 Foreign-Born Population

172 people

As of 2024, 1.07% of Mercer County, IL residents (166 people) were born outside of the United States, which is approximately the same as the national average of 14%. In 2023, the percentage of foreign-born citizens in Mercer County, IL was 1.1%, meaning that the rate has been decreasing.

The following chart shows the percentage of foreign-born residents in Mercer County, IL compared to that of it's neighboring and parent geographies.

Military

Veterans

Most Common Service Period

Vietnam
443 ± 81
Gulf War (2001-)
321 ± 100
Gulf War (1990s)
134 ± 58

Mercer County, IL has a large population of military personnel who served in Vietnam, 1.38 times greater than any other conflict.

The chart shows the distribution of veterans by conflict in Mercer County, IL.

Economy

The economy of Mercer County, IL employs 7.41k people. In 2024, the largest industries in Mercer County, IL were Manufacturing (1,037 people), Retail Trade (934 people), and Health Care & Social Assistance (873 people), and the highest paying industries were Professional, Scientific, & Technical Services ($116,065), Information ($75,694), and Agriculture, Forestry, Fishing & Hunting, & Mining ($72,692).

Employment

Occupations

7.41k

2024 Value

± 452

0.122%

1 Year growth

± 8.56%

From 2023 to 2024, employment in Mercer County, IL grew at a rate of 0.122%, from 7.4k employees to 7.41k employees.

The most common job groups, by number of people living in Mercer County, IL, are Office & Administrative Support Occupations (895 people), Management Occupations (876 people), and Construction & Extraction Occupations (643 people). This chart illustrates the share breakdown of the primary jobs held by residents of Mercer County, IL.

Unemployment Insurance Claims

Data is only available at the state level. Showing data for Illinois.

This chart shows weekly unemployment insurance claims in Illinois (not-seasonally adjusted) compared with the four states with the most similar impact.

The most recent data point uses Advance State Claims data, which can be revised in subsequent weeks.

Industries

Employment by Industries

7.41k

2024 Value

± 452

0.122%

1 Year growth

± 8.56%

From 2023 to 2024, employment in Mercer County, IL grew at a rate of 0.122%, from 7.4k employees to 7.41k employees.

The most common employment sectors for those who live in Mercer County, IL, are Manufacturing (1,037 people), Retail Trade (934 people), and Health Care & Social Assistance (873 people). This chart shows the share breakdown of the primary industries for residents of Mercer County, IL, though some of these residents may live in Mercer County, IL and work somewhere else. Census data is tagged to a residential address, not a work address.

Median Earnings by Industry

$61,910

Median earning men ± $3,166

$39,692

Median earning women ± $2,777

The industries with the best median earnings for men in 2024 are Professional, Scientific, & Management, & Administrative & Waste Management Services ($97,500), Agriculture, Forestry, Fishing & Hunting, & Mining ($81,250), and Information ($78,750).

The industries with the best median earnings for women in 2024 are Information ($75,139), Transportation & Warehousing, & Utilities ($55,893), and Wholesale Trade ($55,000).

Employment by Industry Sector

Data is only available at the state level. Showing data for Illinois.

Y-Axis

2.47%

Year-over-year growth

Employment change between February 2022 and February 2023

As of February 2023, there are 6.03M people employed in Illinois. This represents a 2.47% increase in employment when compared to February 2022.

Right after the beginning of the COVID-19 pandemic, during April 2020, a general dip can be seen across industry sectors, resulting in an overall decline in employment by 13%.

The following chart shows monthly employment numbers for each industry sector in Illinois.

Establishments by Size

The industries with the most establishments

33
Other Services (except Public Administration)
29
Construction
14
Retail Trade

The visualization shows the distribution of establishments by industry and by size according to the number of employees.

The visualization shows the number of establishments and its share across establishment sizes.

Payroll by Industry Sector

The industries with the highest total annual payroll

$37.2k
Manufacturing
$14.7k
Health Care and Social Assistance
$8.49k
Retail Trade

The chart shows the total annual payroll and the average annual payroll by industry.

Civics

In the 2024 presidential election, the popular vote in Illinois went to Kamala Harris with 54.4% of the vote. The runner-up was Donald J. Trump (43.5%), followed by Robert Kennedy (1.43%).

Dick Durbin and Tammy Duckworth are the senators currently representing the state of Illinois. In the United States, senators are elected to 6-year terms with the terms for individual senators staggered.

Illinois is currently represented by 17 members in the U.S. house, and members of the House of Representives are elected to 2-year terms.

Presidential Elections

Presidential Popular Vote Over Time

Voting results are not available for Mercer County, IL. Showing the available data for Illinois.

2024 Election Results

Kamala Harris (54.4%)
Democratic Party
Donald J. Trump (43.5%)
Republican Party
Robert Kennedy (1.43%)
Independent Party

In the 2024 presidential election, the popular vote in Illinois went to Kamala Harris with 54.4% of the vote. The runner-up was Donald J. Trump (43.5%), followed by Robert Kennedy (1.43%).

The following chart shows the popular vote results in Illinois for each registered party from 1976 to 2024.

Senator Elections

US Senators from Illinois

Senatorial voting results are only available at the state level. Showing data for Illinois.

Dick Durbin

Senator from Illinois

Assumed office on January 3, 1997

Tammy Duckworth

Senator from Illinois

Assumed office on January 3, 2017

Dick Durbin and Tammy Duckworth are the senators currently representing Illinois.

In the United States, senators are elected to 6-year terms with the terms for individual senators staggered.

The following chart shows elected senators in Illinois over time, excluding special elections, colored by their political party.

Housing & Living

The median property value in Mercer County, IL was $146,700 in 2024, which is 0.441 times smaller than the national average of $332,700. Between 2023 and 2024 the median property value increased from $139,300 to $146,700, a 5.31% increase. The homeownership rate in Mercer County, IL is 83.8%, which is higher than the national average of 65.2%.

People in Mercer County, IL have an average commute time of 28.1 minutes, and they drove alone to work. Car ownership in Mercer County, IL is approximately the same as the national average, with an average of 2 cars per household.

In 2025, 9.86% of the population was living with severe housing problems in Mercer County, IL. From 2014 to 2025, the indicator grew 1.16%.

Housing

Property

$146,700

Median Property Value 2024

±$7,887

$5,499

Median Property Taxes

±$332

The following chart display owner-occupied housing units distributed between a series of property tax buckets compared to the national averages for each bucket. In Mercer County, IL the largest share of households pay taxes in the $3k+ range.

The chart underneath the paragraph shows the property taxes in Mercer County, IL compared to it's parent and neighbor geographies.

Rent vs Own

83.8%

Homeownership

2024

62%

Homeowners with Mortgage

2024

In 2024, 83.8% of the housing units in Mercer County, IL were occupied by their owner. This percentage grew from the previous year's rate of 82.7%.

This chart shows the percentage of owner in Mercer County, IL compared it's parent and neighboring geographies.

Equity

Household Income

Please note that the buckets used in this visualization were not evenly distributed by ACS when publishing the data.

$74,182

Median Household Income

± $7,031

6.57k

Number of Households

± 412

In 2024, the median household income of the 6.57k households in Mercer County, IL grew to $74,182 from the previous year's value of $71,710.

The following chart displays the households in Mercer County, IL distributed between a series of income buckets compared to the national averages for each bucket. The largest share of households have an income in the $75k - $100k range.

Wage Distribution

The closest comparable wage GINI for Mercer County, IL is from Illinois.

0.474

2023 Wage GINI in Illinois

0.477

2022 Wage GINI in Illinois

In 2023, the income inequality in Illinois was 0.474 according to the GINI calculation of the wage distribution. Income inequality had a 0.554% decline from 2022 to 2023, which means that wage distribution grew somewhat more even. The GINI for Illinois was lower than than the national average of 0.476. In other words, wages are distributed more evenly in Illinois in comparison to the national average.

This chart shows the number of workers in Illinois across various wage buckets compared to the national average.

Transportation

Commuter Transportation

Most Common Commute in 2024

Drove Alone (79.1%)
Worked At Home (10.1%)
Carpooled (8%)

In 2024, 79.1% of workers in Mercer County, IL drove alone to work, followed by those who worked at home (10.1%) and those who carpooled to work (8%).

The following chart shows the number of households using each mode of transportation over time, using a logarithmic scale on the y-axis to help better show variations in the smaller means of commuting.

Commute Time

28.1 minutes

Average Travel Time

Using averages, employees in Mercer County, IL have a longer commute time (28.1 minutes) than the normal US worker (26.4 minutes). Additionally, 2.34% of the workforce in Mercer County, IL have "super commutes" in excess of 90 minutes.

The chart below shows how the median household income in Mercer County, IL compares to that of it's neighboring and parent geographies.

Car Ownership

2 cars

Average Number

The following chart displays the households in Mercer County, IL distributed between a series of car ownership buckets compared to the national averages for each bucket. The largest share of households in Mercer County, IL have 2 cars.

Poverty

Severe Housing Problems

In 2025, 9.86% of the population was living with severe housing problems in Mercer County, IL. From 2014 to 2025, the indicator grew 1.16%.

The graph shows the trend of the percentage of the population living with severe housing problems.

Poverty & Diversity

8.92% of the population for whom poverty status is determined in Mercer County, IL (1.37k out of 15.3k people) live below the poverty line, a number that is lower than the national average of 12.5%. The largest demographic living in poverty are Females 35 - 44, followed by Males 55 - 64 and then Females 18 - 24.

The most common racial or ethnic group living below the poverty line in Mercer County, IL is White, followed by Hispanic and Two Or More.

The Census Bureau uses a set of money income thresholds that vary by family size and composition to determine who classifies as impoverished. If a family's total income is less than the family's threshold than that family and every individual in it is considered to be living in poverty.

Children in Poverty

In 2025, 13.5% of the children was living in poverty in Mercer County, IL. From 2014 to 2025, the indicator grew 0.7%.

The graph shows the trend of the percentage of the children living in poverty.

Social Needs

Data only available at the state level.

Most prevalent states

California
35,798 individuals
New York
5,087 individuals
Florida
4,915 individuals

In 2017, California had the highest estimated number of chronically homeless individuals in the nation, at 35,798. New York has the second highest (5,087), followed by Florida (4,915).

The following map shows the estimated number of chronically homeless individuals by state over multiple years.

Security

Crimes & Accidents

Indicator

In 2022, the number of reported violent crimes offenses per 100,000 population was 95.7 in Mercer County, IL. From 2014 to 2022, the indicator declined 130 per 100,000 population.

The graph shows the trend in the number of reported violent crimes offenses per 100,000 population.

Health

95.4% of the population of Mercer County, IL has health coverage, with 54% on employee plans, 11.2% on Medicaid, 17.4% on Medicare, 11.7% on non-group plans, and 1.11% on military or VA plans.

Primary care physicians in Mercer County, IL see 7,791 patients per year on average, which represents a 0% change from the previous year (7,791 patients). Compare this to dentists who see 5168 patients per year, and mental health providers who see 3872 patients per year.

By gender, of the total number of insured persons, 50.5% were men and 49.5% were women.

Coverage

Patient to Clinician Ratios

7,791 to 1

Patient to Primary Care Physician Ratio in Mercer County, IL

Primary care physicians in Mercer County, IL see an average of 7,791 patients per year. This represents a 0% change from the previous year (7,791 patients).

The following chart shows how the number of patients seen by primary care physicians has been changing over time in Mercer County, IL in comparison to its neighboring geographies.

Health Care Diversity

In 2024, insured persons according to age ranges were distributed in 22% under 18 years, 16.7% between 18 and 34 years, 39.6% between 35 and 64 years, and 21.7% over 64 years.

By gender, of the total number of insured persons, 50.5% were men and 49.5% were women.

The following chart shows the number of people with health coverage by gender.

Uninsured People

4.63%

Uninsured

54%

Employer Coverage

11.2%

Medicaid

17.4%

Medicare

11.7%

Non-Group

1.11%

Military or VA

Between 2023 and 2024, the percent of uninsured citizens in Mercer County, IL declined by 10.5% from 5.17% to 4.63%.

The following chart shows how the percent of uninsured individuals in Mercer County, IL changed over time compared with the percent of individuals enrolled in various types of health insurance.

Health Indicators

Health Outcomes

Indicator

In 2023, the number of deaths among residents under age 18 per 100,000 population was 84 in Mercer County, IL.

The graphic shows the trend of the indicator in Mercer County, IL.

Health Behaviors

Indicator

In 2025, the percentage of the adult population (age 18 and older) that reports a body mass index (BMI) greater than or equal to 30 kg/m2 (age-adjusted) was 36.8% in Mercer County, IL.

The graphic shows the trend of the indicator in Mercer County, IL.