Jefferson County, Illinois
Population, Census, April 1, 2010 38,827
People
Population
Population estimates, July 1, 2025, (V2025) 36,147
Population estimates, July 1, 2024, (V2024) 36,107
Population estimates base, April 1, 2020, (V2025) 37,115
Population estimates base, April 1, 2020, (V2024) 37,113
Population, percent change - April 1, 2020 (estimates base) to July 1, 2025, (V2025) -2.6%
Population, percent change - April 1, 2020 (estimates base) to July 1, 2024, (V2024) -2.7%
Population, Census, April 1, 2020 37,113
Population, Census, April 1, 2010 38,827
Age and Sex
Persons under 5 years, percent 5.6%
Persons under 18 years, percent 22.0%
Persons 65 years and over, percent 20.9%
Female persons, percent 48.4%
Race and Hispanic Origin
White alone, percent 87.2%
Black alone, percent(a) 8.5%
American Indian and Alaska Native alone, percent(a) 0.5%
Asian alone, percent(a) 1.1%
Native Hawaiian and Other Pacific Islander alone, percent(a) Z
Two or More Races, percent 2.7%
Hispanic or Latino, percent(b) 3.0%
White alone, not Hispanic or Latino, percent 85.1%
Population Characteristics
Veterans, 2020-2024 2,196
Foreign-born persons, percent, 2020-2024 1.9%
Housing
Housing Units, July 1, 2025, (V2025) 16,666
Owner-occupied housing unit rate, 2020-2024 71.7%
Median value of owner-occupied housing units, 2020-2024 $126,000
Median selected monthly owner costs - with a mortgage, 2020-2024 $1,278
Median selected monthly owner costs - without a mortage, 2020-2024 $578
Median gross rent, 2020-2024 $885
Building Permits, 2025 12
Families & Living Arrangements
Households, 2020-2024 14,820
Persons per household, 2020-2024 2.37
Living in the same house 1 year ago, percent of persons age 1 year+ , 2020-2024 89.1%
Language other than English spoken at home, percent of persons age 5 years+, 2020-2024 3.6%
Computer and Internet Use
Households with a computer, percent, 2020-2024 92.6%
Households with a broadband Internet subscription, percent, 2020-2024 85.7%
Education
High school graduate or higher, percent of persons age 25 years+, 2020-2024 92.3%
Bachelor's degree or higher, percent of persons age 25 years+, 2020-2024 18.2%
Health
With a disability, under age 65 years, percent, 2020-2024 13.7%
Persons without health insurance, under age 65 years, percent 6.5%
Economy
In civilian labor force, total, percent of population age 16 years+, 2020-2024 59.0%
In civilian labor force, female, percent of population age 16 years+, 2020-2024 56.0%
Total accommodation and food services sales, 2022 ($1,000)(c) 98,295
Total health care and social assistance receipts/revenue, 2022 ($1,000)(c) 519,681
Total transportation and warehousing receipts/revenue, 2022 ($1,000)(c) 54,370
Total retail sales, 2022 ($1,000)(c) 906,446
Total retail sales per capita, 2022(c) $24,889
Transportation
Mean travel time to work (minutes), workers age 16 years+, 2020-2024 19.6
Income & Poverty
Median households income (in 2024 dollars), 2020-2024 $63,118
Per capita income in past 12 months (in 2024 dollars), 2020-2024 $33,038
Persons in poverty, percent 12.9%
Businesses
Businesses
Total employer establishments, 2023 882
Total employment, 2023 19,260
Total annual payroll, 2023 ($1,000) 1,005,552
Total employment, percent change, 2022-2023 3.1%
Total nonemployer establishments, 2023 2,295
All employer firms, Reference year 2023 661
Male-owned employer firms, Reference year 2023 376
Female-owned employer firms, Reference year 2023 S
Minority-owned employer firms, Reference year 2023 S
Nonminority-owned employer firms, Reference year 2023 440
Veteran-owned employer firms, Reference year 2023 28
Nonveteran-owned employer firms, Reference year 2023 459
Geography
Geography
Population per square mile, 2020 65.0
Population per square mile, 2010 68.0
Land area in square miles, 2020 571.23
Land area in square miles, 2010 571.17
FIPS Code 17081