Henry County, Illinois Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 30th-largest in Illinois
The population of Henry County, Illinois is 48,948 as of the 2023 American Community Survey, making it the 30th-largest county in Illinois. The median household income is $69,912, the median home value is $145,300, and the median age is 43.4.
The population of Henry County has declined 4.5% since 2010 (50,459 → 48,177), a -0.33% annualized rate.
48,948
Population
-0.33%
Annual growth
59
People / sq mi
$69,912
Median Income
$145,300
Median Home Value
Henry County covers 823 sq mi of land at 59.5 people per square mile.
About Henry County, IL
Henry County is a county in Illinois with a population of 48,948. It ranks #30 among counties in Illinois by population. The median age is 43.4, older than the national median. The population is 49.6% male and 50.4% female.
The median household income in Henry County is $69,912, below the US median of $74,580. 5.0% of residents live below the federal poverty level. Home values sit at a median of $145,300, with monthly rent averaging $837. The homeownership rate of 80.4% is higher than the national rate of 64.8%.
Educational attainment in Henry County reflects 24.3% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 7.5% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 22.6 minutes each way.
Henry County Population History (2010-2024)
The county of Henry County had a population of 50,459 in 2010 and 48,177 in 2024, a -4.5% growth over 14 years. The peak was 50,459 in 2010. Average annual growth rate: -0.33%.
48,177
Population (2024)
50,459
Population (2010)
50,459
Peak (2010)
-0.33%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 50,459 |
| 2011 | 50,293 |
| 2012 | 50,263 |
| 2013 | 49,932 |
| 2014 | 49,841 |
| 2015 | 49,654 |
| 2016 | 49,511 |
| 2017 | 49,222 |
| 2018 | 49,082 |
| 2019 | 48,933 |
| 2020 | 49,178 |
| 2021 | 48,929 |
| 2022 | 48,567 |
| 2023 | 48,362 |
| 2024 | 48,177 |
Race & Ethnicity
| White | 88.5% |
| Black or African American | 2.2% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.9% |
| Two or More Races | 0.0% |
Age & Sex
43.4
Median Age
50.4%
Female
49.6%
Male
21.2%
Age 65+
Age Distribution
Children (under 15): 17.7% · Seniors (65+): 21.2%
Income & Poverty
| Median household income | $69,912$-11,790 vs state |
| Mean household income | $91,842 |
| Per-capita income | $38,767 |
| Poverty rate | 5.0%-3.2% vs state |
| Unemployment rate | 2.5% |
| Employment-to-population | 59.8% |
Top Industries by Employment
The largest employment sector in Henry County is professional & business services, accounting for 21.5% of workers.
How residents commute
0.1%
Drive alone
2.7%
Carpool
82.0%
Public transit
7.5%
Work from home
22.6 min
Avg commute
Housing
$145,300$-105,200 vs state
Median home value
$837
Median rent
80.4%
Homeownership rate
22,208
Total housing units
91.2%
Occupied
8.8%
Vacant
19.6%
Renter-occupied
Social & access
95.9%
With health insurance
91.3%
With broadband internet
20.5%
Foreign-born
7.8%
Veterans (18+)
13.6%
With a disability
95.9%
Speak language other than English at home
Education
92.1%
High School+
24.3%
Bachelor's+
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Part of Illinois
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County rankings
Frequently Asked Questions
Henry County, Illinois has a population of 48,948 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 30th-largest county in Illinois. Population density is 59 people per square mile.
The population of Henry County has declined 4.5% since 2010 (50,459 → 48,177), a -0.33% annualized rate.
The median household income in Henry County, Illinois is $69,912, with mean (average) household income of $91,842 and per-capita income of $38,767. 5.0% of residents live below the federal poverty level.
In Henry County, the largest racial and ethnic groups are White (88.5%), Black or African American (2.2%), Hispanic or Latino (0.9%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Henry County, Illinois is 43.4 years. Residents are 50.4% female and 49.6% male.
The median home value in Henry County is $145,300 and median monthly rent is $837. 80.4% of occupied housing units are owner-occupied. The county has 22,208 total housing units, 8.8% of which are vacant.
The largest employment sector in Henry County, Illinois is professional, scientific, and management services, employing 21.5% of workers. The unemployment rate is 2.5%.
Chicago is among the largest cities associated with Henry County, Illinois, with a population of 2,707,648.
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Statewide data for Illinois
Population, race, income, age, and trends across Illinois
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.