Monroe County, Illinois Population 2024

34,913

Monroe County, Illinois's estimated 2024 population is 34,913 with a growth rate of -0.13% in the past year according to the most recent United States census data. Monroe County, Illinois is the 40th largest county in Illinois. The 2010 population was 33,051 and has seen a growth of 5.63% since that time.

Note: data after 2022 is projected based on recent change
Year
Population
Growth
Change
202934,693-44-0.13%
202834,737-44-0.13%
202734,781-44-0.13%
202634,825-44-0.13%
202534,869-44-0.13%
202434,913-44-0.13%
202334,957-44-0.13%
202235,001-3-0.01%
202135,004510.15%
202034,9532150.62%
201934,7382920.85%
201834,4461850.54%
201734,2612240.66%
201634,0372260.67%
201533,8112030.6%
201433,608850.25%
201333,5232030.61%
201233,320470.14%
201133,2732220.67%
201033,05100%
199022,4222,30511.46%
198020,1171,2866.83%
197018,8313,32421.44%
196015,5072,22516.75%
195013,2825284.14%
194012,7543853.11%
193012,369-470-3.66%
192012,839-669-4.95%
191013,508-339-2.45%
190013,8478996.94%
189012,948-734-5.36%
188013,6827005.39%
187012,9821501.17%
186012,8325,15367.11%
18507,6793,19871.37%
18404,4812,481124.05%
18302,00046330.12%
18201,537-33,156-95.57%
2024 Growth Rate
-0.13% (-44)
County Website
Monroe County
County Seat
Waterloo
2020 Population
34,953
Area
385 mi²
Density
91 people/mi²
Growth Since 2020
-0.11% (-40)
Founded
1816

Population by Race

Race
Population
Percentage (of total)
White33,61596.13%
Two or more races6741.93%
Other race2690.77%
Black or African American2080.59%
Asian1660.47%
Native American370.11%
Native Hawaiian or Pacific Islander00%

White

Two or more races

Other race

Black or African American

Asian

Native American

Native Hawaiian or Pacific Islander

Monroe County, Illinois Population by Race

Monroe County, Illinois Population Pyramid 2024

Monroe County, Illinois Median Age

42.5

Total

41.4

Male

43.8

Female

Monroe County, Illinois Adults

There are 27,240 adults, (6,588 of whom are seniors) in Monroe County, Illinois.

Monroe County, Illinois Age Dependency

69.3

Age Dependency Ratio

31.9

Old Age Dependency Ratio

37.4

Child Dependency Ratio

Monroe County, Illinois Sex Ratio

Female17,35749.64%
Male17,61250.36%

Monroe County, Illinois Population by Age

Monroe County, Illinois Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All13,8302.5183.816.2
Married8,2673.0895.74.3
Non Family3,9971.1564.935.1
Female1,0092.9765.734.3
Male5573.0175.924.1

3

Average Family Size

2.51

Average Household Size

83.8%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Monroe County, Illinois Households and Families

Male

Female

Education Attained
Count
Percentage
9th to 12th Grade8693.49%
Associates Degree2,66210.69%
Bachelors Degree6,03324.23%
Graduate Degree3,48514%
High School Graduate6,03224.23%
Less Than 9th Grade1830.74%
Some College5,63222.62%

Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

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

Monroe County, Illinois Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

Race
Total
High School
Bachelors
White23,92022,9279,137
Hispanic448418104
2+ Races32732799
Other Race20016153
Asian166166133
Black644433
Native American12120

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

The highest rate of bachelors degrees is among asian people with a rate of 80.12%.

Monroe County, Illinois Educational Attainment by Race

All

Male

Female

Name
Average
Male
Female
Bachelors Degree$75,140$84,353$61,758
Graduate Degree$89,196$111,991$80,682
High School Graduate$48,153$59,695$40,829
Less Than 9th Grade$14,105$0$0
Overall$63,551$71,652$54,424
Some College$52,183$64,257$44,104

$63,551

Average Earnings

$71,652

Average Male

$54,424

Average Female

Monroe County, Illinois Earnings by Educational Attainment

Monroe County, Illinois Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Monroe County, Illinois Language

98.19% of Monroe County, Illinois residents speak only English, while 1.81% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 1.05% of the population.

Monroe County, Illinois Language

Monroe County, Illinois Poverty by Race

rate

Name
Total
In Poverty
Poverty Rate
White32,9471,2713.86%
Black17413778.74%
Hispanic65112919.82%
Multiple669324.78%
Asian166148.43%

4.58%

Overall Poverty Rate

3.68%

Male Poverty Rate

5.5%

Female Poverty Rate

Poverty in Monroe County, Illinois

The race most likely to be in poverty in Monroe County, Illinois is Black, with 78.74% below the poverty level.

The race least likely to be in poverty in Monroe County, Illinois is White, with 3.86% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 0.59%. Among those working part-time, it was 5.07%, and for those that did not work, the poverty rate was 11.05%.

Monroe County, Illinois Poverty

rate

Rate
Poverty
Less Than 9th Grade19.5%
Some College5.38%
High School5.11%
Bachelors or Greater1.47%

Monroe County, Illinois Poverty Rate by Education

rate

Rate
Poverty
Male Unemployed16.6%
Female Employed2.68%
Male Employed0.42%
Female Unemployed0%

Monroe County, Illinois Poverty Rate by Employment Status and Sex

Monroe County, Illinois Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

Name
Median
Mean
Families$128,922$147,261
Households$101,635$122,572
Married Families$137,948$-999,999,999
Non Families$49,252$57,374

mean

median

Income by Household Type

Monroe County, Illinois Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

59.2%

Overall Marriage Rate

60.2%

Male Marriage Rate

58.2%

Female Marriage Rate

Monroe County, Illinois Married by Age and Sex

male

female

Monroe County, Illinois Marriage

The age group where males are most likely to be married is 35-44, while the female age group most likely to be married is 45-54.

Monroe County, Illinois Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Monroe County, Illinois Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

2,309

Number of Veterans

2,121

Male Veterans

188

Female Veterans

War
Veterans
Vietnam828
First Gulf War627
Second Gulf War436
Korea92
World War II67

Monroe County, Illinois Veterans by War

count

Age Group
Veterans
65 to 74615
35 to 54550
75+547
55 to 64503
18 to 3494

Monroe County, Illinois Veterans by Age

count

Name
Veterans
% of Total
White2,2598.57%
2+ Races3810.3%
Hispanic102.11%
Other Race73.5%
Black54.39%

Monroe County, Illinois Veterans by Race

Monroe County, Illinois Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

3.97%

Veteran Poverty Rate

22.93%

Veteran Disability Rate

Monroe County, Illinois Veterans by Education

LaborForceParticipation

68.5%

Labor Force Participation

66.9%

Employment Rate

2.1%

Unemployment Rate

Monroe County, Illinois Employment by Age

LaborForceParticipation

Monroe County, Illinois Employment by Race

LaborForceParticipation

Monroe 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

54.78%

Born in Monroe County, Illinois

98.85%

Native Born

1.15%

Foreign Born

0.16%

Non Citizen

0.99%

Naturalized

Place of Birth

98.85% of Monroe County, Illinois residents were born in the United States, with 54.78% having been born in Illinois. 0.16% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Monroe County, Illinois Place of Birth

Sources