Jo Daviess County, Illinois Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 53rd-largest in Illinois
The population of Jo Daviess County, Illinois is 21,918 as of the 2023 American Community Survey, making it the 53rd-largest county in Illinois. The median household income is $74,954, the median home value is $193,900, and the median age is 50.9.
The population of Jo Daviess County has declined 4.9% since 2010 (22,647 → 21,528), a -0.36% annualized rate.
21,918
Population
-0.36%
Annual growth
36
People / sq mi
$74,954
Median Income
$193,900
Median Home Value
Jo Daviess County covers 601 sq mi of land at 36.5 people per square mile.
About Jo Daviess County, IL
Age is the most distinctive thing about Jo Daviess County: a median age of 50.9, older than the national median. Jo Daviess County is a county in Illinois with a population of 21,918.
Median household income is $74,954, near the US median of $78,538. Only 5.0% of residents live in poverty, below the national 12.4%. Median home value is $193,900, with typical rent around $795.
About 28.8% of adults 25 and older have a bachelor’s degree, below the 35.0% national figure. About 12.0% of workers primarily work from home, below the national 14.0%, and the average commute runs about 21 minutes each way.
The age structure shapes everything downstream in Jo Daviess County — from housing demand to the mix of working-age earners reflected in the income figures above.
Jo Daviess County Population History (2010-2024)
The county of Jo Daviess County had a population of 22,647 in 2010 and 21,528 in 2024, a -4.9% growth over 14 years. The peak was 22,647 in 2010. Average annual growth rate: -0.35%.
21,528
Population (2024)
22,647
Population (2010)
22,647
Peak (2010)
-0.35%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 22,647 |
| 2011 | 22,638 |
| 2012 | 22,542 |
| 2013 | 22,398 |
| 2014 | 22,341 |
| 2015 | 22,068 |
| 2016 | 21,826 |
| 2017 | 21,509 |
| 2018 | 21,349 |
| 2019 | 21,224 |
| 2020 | 22,098 |
| 2021 | 22,016 |
| 2022 | 21,863 |
| 2023 | 21,749 |
| 2024 | 21,528 |
Race & Ethnicity
| White | 94.0% |
| Black or African American | 0.8% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.8% |
| Two or More Races | 0.0% |
Age & Sex
50.9
Median Age
49.7%
Female
50.3%
Male
29.1%
Age 65+
Age Distribution
Children (under 15): 15.0% · Seniors (65+): 29.1%
Income & Poverty
| Median household income | $74,954$-6,748 vs state |
| Mean household income | $92,828 |
| Per-capita income | $42,797 |
| Poverty rate | 5.0%-3.2% vs state |
| Unemployment rate | 1.8% |
| Employment-to-population | 60.0% |
Top Industries by Employment
The largest employment sector in Jo Daviess County is professional & business services, accounting for 19.8% of workers.
How residents commute
0.5%
Drive alone
4.1%
Carpool
76.4%
Public transit
12.0%
Work from home
21.3 min
Avg commute
Housing
$193,900$-56,600 vs state
Median home value
$795
Median rent
81.8%
Homeownership rate
13,425
Total housing units
77.4%
Occupied
22.6%
Vacant
18.2%
Renter-occupied
Social & access
94.8%
With health insurance
91.3%
With broadband internet
51.9%
Foreign-born
8.4%
Veterans (18+)
13.7%
With a disability
97.7%
Speak language other than English at home
Education
93.4%
High School+
28.8%
Bachelor's+
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County rankings
Frequently Asked Questions
Jo Daviess County, Illinois has a population of 21,918 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 53rd-largest county in Illinois. Population density is 36 people per square mile.
The population of Jo Daviess County has declined 4.9% since 2010 (22,647 → 21,528), a -0.36% annualized rate.
The median household income in Jo Daviess County, Illinois is $74,954, with mean (average) household income of $92,828 and per-capita income of $42,797. 5.0% of residents live below the federal poverty level.
In Jo Daviess County, the largest racial and ethnic groups are White (94.0%), Black or African American (0.8%), Hispanic or Latino (0.8%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Jo Daviess County, Illinois is 50.9 years. Residents are 49.7% female and 50.3% male.
The median home value in Jo Daviess County is $193,900 and median monthly rent is $795. 81.8% of occupied housing units are owner-occupied. The county has 13,425 total housing units, 22.6% of which are vacant.
The largest employment sector in Jo Daviess County, Illinois is professional, scientific, and management services, employing 19.8% of workers. The unemployment rate is 1.8%.
Chicago is among the largest cities associated with Jo Daviess County, Illinois, with a population of 2,707,648.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.