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County ZIP codes · Illinois · FIPS 17007

Boone County, IL ZIP Codes

Boone County, Illinois has 15 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 5 of the residential ones lie mainly in Boone County and 10 mainly in a neighboring county; 12 cross the county line. Median household income ranges from $61,393 in 61111 (Loves Park) to $127,273 in 61011 (Caledonia) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Boone County?

60033 · Harvard: $69k60135 · Genoa: $98k60145 · Kingston: $109k60146 · Kirkland: $88k61008 · Belvidere: $77k61011 · Caledonia: $127k61012 · Capron: $99k61016 · Cherry Valley: $85k61038 · Garden Prairie: $105k61065 · Poplar Grove: $97k61073 · Roscoe: $102k61080 · South Beloit: $77k61107 · Rockford: $79k61111 · Loves Park: $61k61114 · Rockford: $86k60033610086103860135610656014661011601456101261016610736111161080611076111460033 · Harvard: $69k60135 · Genoa: $98k60145 · Kingston: $109k60146 · Kirkland: $88k61008 · Belvidere: $77k61011 · Caledonia: $127k61012 · Capron: $99k61016 · Cherry Valley: $85k61038 · Garden Prairie: $105k61065 · Poplar Grove: $97k61073 · Roscoe: $102k61080 · South Beloit: $77k61107 · Rockford: $79k61111 · Loves Park: $61k61114 · Rockford: $86k60033610086103860135610656014661011601456101261016610736111161080611076111460033 · Harvard: $69k60135 · Genoa: $98k60145 · Kingston: $109k60146 · Kirkland: $88k61008 · Belvidere: $77k61011 · Caledonia: $127k61012 · Capron: $99k61016 · Cherry Valley: $85k61038 · Garden Prairie: $105k61065 · Poplar Grove: $97k61073 · Roscoe: $102k61080 · South Beloit: $77k61107 · Rockford: $79k61111 · Loves Park: $61k61114 · Rockford: $86k6003361008610386013561065601466101661073611116108061107
The residential ZIP codes of Boone County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024). <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are its ZIP codes?

The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $76,604 and $98,594.

They carry 14 postal town names.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).

All 15 residential ZIP codes in Boone County

5 ZIP codes lie mainly in Boone County; 10 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Boone County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
61008 Belvidere 33,582 398 $77k $196k 100%
61065 Poplar Grove 10,570 208 $97k $217k 100%
61011 Caledonia 2,676 69 $127k $312k 82%
61012 Capron 2,264 63 $99k $172k 100%
61038 Garden Prairie 1,274 30 $105k $282k 93%

Partly in Boone County

Residential ZIP codes mainly in another county that reach at least 1% into Boone County, by their share here
In this county
61016 Cherry Valley 5,465 193 $85k $231k 43%
61080 South Beloit 10,955 437 $77k $181k 29%
61114 Rockford 15,325 1,882 $86k $204k 12%
60146 Kirkland 2,369 43 $88k $222k 10%
60033 Harvard 12,999 111 $69k $203k 6%
61107 Rockford 30,765 2,062 $79k $175k 6%
60145 Kingston 2,464 73 $109k $268k 5%
61111 Loves Park 23,286 1,637 $61k $159k 4%
61073 Roscoe 20,194 723 $102k $239k 4%
60135 Genoa 7,274 155 $98k $254k 2%

Download the 15 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).

Which ZIP codes cross the county line?

12 ZIP codes of Boone County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Boone County and in the neighboring counties
ZIPIn BooneElsewhere
611076%Winnebago County 94%
611114%Winnebago County 96%
610734%Winnebago County 96%
6111412%Winnebago County 88%
600336%McHenry County 94%
6108029%Winnebago County 71%
601352%DeKalb County 96%; McHenry County 2%
6101643%Winnebago County 57%
6101182%Winnebago County 18%
601455%DeKalb County 95%
6014610%DeKalb County 88%; Ogle County 2%
6103893%McHenry County 7%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

Which first three digits do Boone County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Boone County's ZIP codes use 4 prefixes: 600, 601, 610 and 611.

Three-digit prefixes of Boone County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Boone County's
PrefixSectional centerHereAll codes
600 Palatine, IL (SCF 600) 1 82
601 Carol Stream, IL (SCF 601) 3 89
610 Palatine, IL (SCF 600) 8 66
611 Palatine, IL (SCF 600) 3 19

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.