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zipcodes.pro — STATE/IL/COUNTY/BOONE

Boone County, IL ZIP codes

Boone County, IL has 5 ZIP codes, in 5 towns: 61008, 61065, 61011, 61012 and 61038.

The county seat is Belvidere.

ZIP codes
5
Towns
5
County seat
Belvidere
County FIPS
17007
Population
53,230
Median household income
$84,571
Land area
281 sq mi
Area codes
779, 815
Metro area
Rockford

Boone County ZIP codes by town

Belvidere (county seat)
61008

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

Map of Boone County ZIP codes

6100861011610126103861065

The ZIP codes of Boone County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Boone County in numbers

About 53,230 people live in Boone County, in 19,460 households, the 25th most populous of Illinois's 102 counties. The median household income is $84,571 a year, about the same as the Illinois median of $83,390 (US: $80,734). The median owner-occupied home is valued at $216,900 (18% below the Illinois median), and median gross rent is $1,041 a month. The median age is 39.7; 23.6% of adults 25 and over hold a bachelor's degree or higher (37.8% across Illinois); the average commute takes 27 minutes.

Population53,230Boone53,230
Households19,460Boone19,460
Median age39.7Boone39.7Illinois39.0US 38.9
Median household income$84,571Boone$84,571Illinois$83,390US $80,734
Median home value$216,900Boone$216,900Illinois$263,300US $332,700
Median gross rent$1,041Boone$1,041Illinois$1,274US $1,413
Bachelor's degree or higher23.6%Boone23.6%Illinois37.8%US 35.7%
Mean commute26.6 minBoone26.6 minIllinois27.8 minUS 26.4 min
Population density190 / sq miBoone190 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Boone County

Largest towns in Boone County
TownZIP codesPopulation
Belvidere 1 24,752
Poplar Grove 1 3,923
Capron 1 1,311
Garden Prairie 1 403
Caledonia 1 226

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Boone County.

Not sure you are in Boone County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Boone County, with figures

ZIP codes in Boone County
ZIP City Type Population Median income Median home
61008 Belvidere , IL Standard 33,582 $76,604 $195,800
61011 Caledonia , IL Standard 2,676 $127,273 $311,900
61012 Capron , IL Standard 2,264 $98,594 $172,000
61038 Garden Prairie , IL Standard 1,274 $104,875 $281,600
61065 Poplar Grove , IL Standard 10,570 $97,386 $217,300

Cite this page

zipcodes.pro. “Boone County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/il/county/boone

Underlying data is public domain or openly licensed — sources, vintages and licences.