United States › Illinois › Monroe County COUNTY
Monroe County Illinois · 34,840 residents (2025 est.) · 385 sq mi
Time machine
COMPARE TO 1990 Census 2000 Census 2009 ACS 2010 ACS 2011 ACS 2012 ACS 2013 ACS 2014 ACS 2015 ACS 2016 ACS 2017 ACS 2018 ACS 2019 ACS 2020 ACS 2021 ACS 2022 ACS 2023 ACS
The short version
With 35,036 people, Monroe County is a county in Illinois. Owners hold 85% of the housing stock. That puts it in the top 1% of US counties for household income. 1% of people here were born outside the United States. The median age is 43.2, about 4 years above the US median. The population is up 27% since 2000.
At a glance
Wealthier
above the US median
US median: $82,259
Older
median age 43.2
US median: 38.9
Average education
39% hold a bachelor's degree
US average: 36%
Stable housing
home values roughly flat, inflation adjusted
US median home: $376,019
Section 01
Population & growth from 27,619 in 2000
34,840 in 2025 (Census Bureau estimate)
from 84 / sq mi in 2009
US average: 281
from 37.5 in 2000
US average: 38.9
Population, 1990 – 2024
21K 25K 29K 33K 36K 1990 2000 2010 2020 2024 Monroe County Age distribution, 2024
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02
Income & economy $102,880
+2%inflation adjusted, since 2000
from $55,320 in 2000
US average: $82,259
from $22,954 in 2000
US average: $44,673
Households earning $100K+
from 43.9% in 2009
US average: 53.3%
from 3.4% in 2000
US average: 12.5%
from 0.386 in 2010
US average: 0.476
Workforce by industry, 2024
Public administration 7.5%
Professional, scientific, technical 3.9%
Agriculture, forestry, fishing 3.1%
Education & health services 2.1%
Transportation & warehousing 2.1%
Arts, entertainment, food 1.5%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
$282,100
+23%inflation adjusted, since 2000
from $125,900 in 2000
US average: $376,019
$1,042
+2%inflation adjusted, since 2000
from $562 in 2000
US average: $1,442
from 80.2% in 2000
15.3% rent
from 5.7% in 2009
US average: 10.0%
from 2.68 people in 2009
US average: 2.54
from 23.7% in 2009
US average: 22.9%
from 33.7% in 2009
US average: 47.4%
from 2.8 in 2009
Years of local income it takes to buy a local home, on a scale of about 0 to 15. Lower is more affordable.
Our index, 0 to 100. Higher means faster recent growth in incomes, home values, and college degrees.
Section 04
Race & ethnicity 2000
White, non-Hispanic 98.3%(27,156)
Hispanic / Latino 0.7%(203)
2024
White, non-Hispanic 95%(33,291)
Hispanic / Latino 1.9%(683)
from 8 in 2009
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
from 20 in 2020
Our index, 0 to 100. Higher means White and non-White residents are more separated across neighborhoods.
Section 04 · Origins
Detailed origins & ancestry Ancestry
+ 23 more ancestry groups with data from 20.4% in 2000
US average: 35.6%
High school or higher
from 87.2% in 2000
US average: 89.6%
from 7.0% in 2000
US average: 14.0%
Section 06
Commute & transportation from 21.1 min in 2000
US average: 26.5
from 81.8% in 2009
US average: 68.9%
from 11.3% in 2009
US average: 8.5%
from 0.8% in 2009
US average: 3.2%
from 4.4% in 2009
US average: 15.0%
from 1.4% in 2009
US average: 2.4%
from 0.1% in 2009
US average: 0.4%
from 2.7% in 2009
US average: 8.3%
Section 07
Work & employment from 5.4% in 2011
US average: 5.2%
from 69.2% in 2011
US average: 63.5%
Women 20-64 in the labor force
from 84.6% in 2020
US average: 74.6%
from 10.6% in 2009
US average: 13.1%
from 32.7% in 2009
US average: 42.5%
Section 08
People & community from 1.2% in 2009
US average: 14.1%
from 10.7% in 2009
US average: 6.2%
from 9.6% in 2012
US average: 13.3%
from 5.9% in 2013
US average: 8.4%
from 80.2% in 2017
US average: 91.0%
Computer in household
from 92.2% in 2020
US average: 95.5%
from 91.6% in 2020
US average: 87.7%
from 97.2% in 2016
US average: 77.7%
from 0.7% in 2016
US average: 13.6%
Marital status
Men 15+
Never married 26.1%(3,730)
Women 15+
Never married 19.7%(2,858)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Section 09
Health coverage from 5.9% in 2013
US average: 8.4%
from 73.9% in 2020
US average: 54.8%
Direct-purchase
from 14.7% in 2020
US average: 13.8%
from 18.5% in 2020
US average: 18.4%
from 7.4% in 2020
US average: 20.9%
VA health care
from 2.3% in 2020
US average: 2.2%
Any private
from 85.7% in 2020
US average: 67.1%
Any public
from 24.9% in 2020
US average: 36.7%
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans Veterans by period of service, 2024
Gulf War (2001 or later) 21.3%(505)
Gulf War (1990s) 27.3%(647)
Share of the 2,373 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Drill deeper
Places similar to Monroe County Head to head
Compare Monroe County to nearby counties MONROE COUNTY VS
St. Clair County
Income $73,854 −28%
Home value $180,300 −36%
Population 250,708 +620%
SEE FULL COMPARISON →
MONROE COUNTY VS
Jefferson County
Income $82,851 −19%
Home value $237,200 −16%
Population 233,132 +569%
SEE FULL COMPARISON →
MONROE COUNTY VS
Randolph County
Income $68,131 −34%
Home value $135,100 −52%
Population 29,921 −14%
SEE FULL COMPARISON →
MONROE COUNTY VS
St. Louis
Income $56,160 −45%
Home value $197,500 −30%
Population 278,144 +698%
SEE FULL COMPARISON →
Frequently asked
How many people live in Monroe County, Illinois? Monroe County, Illinois has about 35,036 residents according to the 2024 American Community Survey.
What is the median household income in Monroe County, Illinois? The typical household in Monroe County, Illinois earns about $102,880 a year. Half of households make more than that, and half make less.
Is Monroe County, Illinois expensive? In Monroe County, Illinois, the median home is worth about $282,100, and the typical rent is about $1,042 a month.
How educated are people in Monroe County, Illinois? About 38.7% of adults age 25 and over in Monroe County, Illinois hold a bachelor's degree or higher.
What is the poverty rate in Monroe County, Illinois? About 5.0% of people in Monroe County, Illinois live below the federal poverty line.
Has Monroe County, Illinois grown since 1990? Yes, Monroe County, Illinois has grown since 1990. The population has added about 12,614 residents, a change of about 56 percent over that period.
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