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Boone County, IL
8 cities and towns and 6 ZIP codes in Boone County, Illinois.
Population
53,230
Land area
281sq mi
People per sq mi
190
ZIP codes
6
Cities and towns in Boone County
Boone County at a glance
- The median household income is $84,571, close to the Illinois median.
- A typical owner-occupied home is valued at $216,900 (18% below Illinois) and median rent is $1,041 a month.
- The biggest population centers are Belvidere (24,752), Candlewick Lake (5,448) and Poplar Grove (3,923).
Local data for Boone County, IL
Counts from official public data
Housing and community stats
Boone County, IL, American Community Survey 2020-2024
Median household income
$84,571
Poverty rate
9.9%
Median home value
$216,900
Prices +7.6% in a year
Median rent
$1,041/mo
Homeownership
81.8%
Bachelor's or higher
23.6%
Median age
39.7
Average commute
26.6 min
Largest reported origins and ancestries: German Americans (12,610), Mexican Americans (12,111), Irish Americans (6,733).
Economy and federal money
Jobs, income, federal spending and pandemic loans
Unemployment rate
4.0%
Sep 2026, -0.8 pts in a year
Average annual pay
$57,255
11,310 jobs, 2025
Income per person
$59,708
BEA, 2024
Federal spending
$332M
FY 2026, $6,219 per person
PPP loans
$78.7M
1,232 loans, 9,378 jobs reported
Campaign donations
$214K
Itemized, 2026 cycle
How people get to work
Boone County, IL, workers 16 and older. American Community Survey 5-year estimates
- Drove alone78.8%
- Carpooled9.7%
- Public transit0.3%
- Walked1.0%
- Bicycle0.0%
- Taxi, ride-hailing, motorcycle or other0.7%
- Worked from home9.6%
Average one-way commute: 26.6 minutes for people who do not work from home.
Environment and hazard risk
Boone County, IL, from FEMA, NOAA and EPA
Natural hazard risk
Relatively Low
Top: hail
Storm events since 1996
381
Most often thunderstorm wind
Flood insurance policies
62
0.3% of homes, county
July high / Jan low
84° / 13°F
37.6 inches of rain a year
Hazards, floods and storm historyCheck a flood zone4 historic places
Health statistics
Share of adults in Boone County, IL, CDC PLACES estimates
Obesity
36.8%
U.S. 33.3% +3.5 pts
Diabetes
12.2%
U.S. 12.1% about the same
Smoking
14.1%
U.S. 12.8% +1.3 pts
Uninsured (18-64)
11.8%
U.S. 11.1% +0.7 pts
Cities, towns and ZIP codes in Boone County
Population shown
Frequently asked questions
- What is the largest city in Boone County, IL?
- Belvidere is the largest city or town in Boone County, with about 24,752 residents.
- How many ZIP codes are in Boone County?
- Boone County includes 6 ZIP Code Tabulation Areas, including 61008, 61011, 61012, 61016, 61038.
- What is the population of Boone County, IL?
- About 53,230 people live in Boone County, based on American Community Survey 5-year estimates.
- What counties border Boone County?
- Boone County borders McHenry County, Winnebago County, Rock County, WI, Walworth County, WI, DeKalb County, Ogle County.
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023