Carroll County, Illinois ZIP codes
7 ZIP codes are in Carroll County, plus 4 that cross in from neighboring counties.
- ZIP codes
- 7
- Population in these ZIPs
- 16,069
- Avg. median income
- $64,900population-weighted
- Cities & towns
- 7
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ZIP codes in Carroll County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 61014 | Chadwick | 1,067 | $69,329 | $152,700 |
| 61046 | Lanark | 2,794 | $79,398 | $332,800 |
| 61051 | Milledgeville | 1,469 | $59,565 | $151,500 |
| 61053 | Mount Carroll | 2,590 | $62,250 | $149,400 |
| 61074 | Savanna | 3,962 | $50,691 | $93,500 |
| 61078 | Shannon | 1,459 | $75,769 | $183,800 |
| 61285 | Thomson | 2,728 | $68,500 | $156,600 |
ZIP codes partly in Carroll County
These ZIP codes are mostly in a neighboring county but cover part of Carroll County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 61028 | Elizabeth | Jo Daviess County | 1,683 | $86,053 | $212,000 |
| 61062 | Pearl City | Stephenson County | 1,840 | $66,667 | $219,000 |
| 61064 | Polo | Ogle County | 3,757 | $75,386 | $179,400 |
| 61270 | Morrison | Whiteside County | 6,912 | $80,867 | $173,200 |
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 Carroll County
Nearby counties
Frequently asked questions
How many ZIP codes are in Carroll County, Illinois?
7 ZIP codes are mainly in Carroll County, and 4 more ZIP codes from neighboring areas reach partly into it.
What cities are in Carroll County?
ZIP codes in Carroll County use the city names Chadwick, Lanark, Milledgeville, Mount Carroll, Savanna, Shannon and Thomson.