Boone County, Illinois Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 25th-largest in Illinois
The population of Boone County, Illinois is 53,316 as of the 2023 American Community Survey, making it the 25th-largest county in Illinois. The median household income is $81,638, the median home value is $198,600, and the median age is 39.5.
The population of Boone County has declined 1.4% since 2010 (54,094 → 53,313), a -0.10% annualized rate.
53,316
Population
-0.10%
Annual growth
190
People / sq mi
$81,638
Median Income
$198,600
Median Home Value
Boone County covers 281 sq mi of land at 189.9 people per square mile.
About Boone County, IL
Homeownership is the standout figure in Boone County: 83.0% of homes are owner-occupied, higher than the national rate. With 53,316 residents, Boone County is a county in Illinois. It ranks #25 among counties in Illinois by population.
Median household income is $81,638, near the US median of $78,538. The poverty rate is 7.6%, below the national 12.4%. Median home value is $198,600, with typical rent around $1,011.
Roughly 23.2% of adults have a bachelor’s, below the national 35.0%. Around 9.4% of workers work from home, below the national 14.0%, and the average commute runs about 27 minutes each way.
The ownership rate anchors the housing story in Boone County, and tends to move with the age structure and home-value figures above.
Boone County Population History (2010-2024)
The county of Boone County had a population of 54,094 in 2010 and 53,313 in 2024, a -1.4% growth over 14 years. The peak was 54,123 in 2011. Average annual growth rate: -0.10%.
53,313
Population (2024)
54,094
Population (2010)
54,123
Peak (2011)
-0.10%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 54,094 |
| 2011 | 54,123 |
| 2012 | 53,729 |
| 2013 | 53,737 |
| 2014 | 53,702 |
| 2015 | 53,571 |
| 2016 | 53,559 |
| 2017 | 53,481 |
| 2018 | 53,368 |
| 2019 | 53,281 |
| 2020 | 53,339 |
| 2021 | 53,173 |
| 2022 | 53,084 |
| 2023 | 53,239 |
| 2024 | 53,313 |
Race & Ethnicity
| White | 74.2% |
| Black or African American | 2.5% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.9% |
| Two or More Races | 0.0% |
Age & Sex
39.5
Median Age
50.0%
Female
50.0%
Male
16.4%
Age 65+
Age Distribution
Children (under 15): 19.3% · Seniors (65+): 16.4%
Income & Poverty
| Median household income | $81,638$-64 vs state |
| Mean household income | $103,936 |
| Per-capita income | $38,437 |
| Poverty rate | 7.6%-0.6% vs state |
| Unemployment rate | 5.1% |
| Employment-to-population | 60.7% |
Top Industries by Employment
The largest employment sector in Boone County is manufacturing, accounting for 22.7% of workers.
How residents commute
0.5%
Drive alone
0.9%
Carpool
77.0%
Public transit
9.4%
Work from home
27.3 min
Avg commute
Housing
$198,600$-51,900 vs state
Median home value
$1,011
Median rent
83.0%
Homeownership rate
20,238
Total housing units
94.6%
Occupied
5.4%
Vacant
17.0%
Renter-occupied
Social & access
95.2%
With health insurance
94.3%
With broadband internet
19.0%
Foreign-born
5.6%
Veterans (18+)
13.7%
With a disability
80.0%
Speak language other than English at home
Education
85.6%
High School+
23.2%
Bachelor's+
Largest cities in Illinois
Other counties in Illinois
Part of Illinois
Metro areas in Illinois
County rankings
Frequently Asked Questions
Boone County, Illinois has a population of 53,316 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 25th-largest county in Illinois. Population density is 190 people per square mile.
The population of Boone County has declined 1.4% since 2010 (54,094 → 53,313), a -0.10% annualized rate.
The median household income in Boone County, Illinois is $81,638, with mean (average) household income of $103,936 and per-capita income of $38,437. 7.6% of residents live below the federal poverty level.
In Boone County, the largest racial and ethnic groups are White (74.2%), Black or African American (2.5%), Hispanic or Latino (1.9%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Boone County, Illinois is 39.5 years. Residents are 50.0% female and 50.0% male.
The median home value in Boone County is $198,600 and median monthly rent is $1,011. 83.0% of occupied housing units are owner-occupied. The county has 20,238 total housing units, 5.4% of which are vacant.
The largest employment sector in Boone County, Illinois is manufacturing, employing 22.7% of workers. The unemployment rate is 5.1%.
Chicago is among the largest cities associated with Boone County, Illinois, with a population of 2,707,648.
Boone County, IL Climate
Boone County, IL has an average annual temperature of 8.6°C (47°F) and receives about 904 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
8.6°C
Avg Temp
904
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -7° / 19° | 34 mm |
| February | -4° / 24° | 30 mm |
| March | 2° / 35° | 61 mm |
| April | 9° / 47° | 92 mm |
| May | 15° / 59° | 92 mm |
| June | 20° / 69° | 108 mm |
| July | 23° / 73° | 101 mm |
| August | 21° / 70° | 106 mm |
| September | 17° / 62° | 96 mm |
| October | 11° / 51° | 67 mm |
| November | 3° / 37° | 67 mm |
| December | -4° / 25° | 50 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Boone County, IL
The most comfortable months to visit Boone County, IL are typically August, June and July, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 29°C high). The coldest is January (near -12°C low). June is usually the wettest month.
Where to stay near Boone County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.