Boone County, Illinois ZIP codes
5 ZIP codes are in Boone County, plus 10 that cross in from neighboring counties. It's part of the Rockford, IL metro area.
- ZIP codes
- 5
- Population in these ZIPs
- 50,366
- Avg. median income
- $85,400population-weighted
- Cities & towns
- 5
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Boone County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 61008 | Belvidere | 33,582 | $76,604 | $264,400 |
| 61011 | Caledonia | 2,676 | $127,273 | $380,600 |
| 61012 | Capron | 2,264 | $98,594 | $272,900 |
| 61038 | Garden Prairie | 1,274 | $104,875 | $331,000 |
| 61065 | Poplar Grove | 10,570 | $97,386 | $278,700 |
ZIP codes partly in Boone County
These ZIP codes are mostly in a neighboring county but cover part of Boone County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 60033 | Harvard | McHenry County | 12,999 | $68,633 | $279,300 |
| 60135 | Genoa | DeKalb County | 7,274 | $98,033 | $310,700 |
| 60145 | Kingston | DeKalb County | 2,464 | $108,477 | $320,600 |
| 60146 | Kirkland | DeKalb County | 2,369 | $88,032 | $278,500 |
| 61016 | Cherry Valley | Winnebago County | 5,465 | $84,883 | $295,000 |
| 61073 | Roscoe | Winnebago County | 20,194 | $102,064 | $315,800 |
| 61080 | South Beloit | Winnebago County | 10,955 | $76,579 | $242,500 |
| 61107 | Rockford | Winnebago County | 30,765 | $78,574 | $225,700 |
| 61111 | Loves Park | Winnebago County | 23,286 | $61,393 | $206,400 |
| 61114 | Rockford | Winnebago County | 15,325 | $85,568 | $271,500 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Boone County
Nearby counties
Frequently asked questions
How many ZIP codes are in Boone County, Illinois?
5 ZIP codes are mainly in Boone County, and 10 more ZIP codes from neighboring areas reach partly into it.
What cities are in Boone County?
ZIP codes in Boone County use the city names Belvidere, Caledonia, Capron, Garden Prairie and Poplar Grove.
What metro area is Boone County in?
Boone County is part of the Rockford, IL metropolitan statistical area.