Carroll County, IL ZIP codes
There are 7 ZIP codes in Carroll County, IL, in 7 towns, from 61014 to 61285. The largest are 61074 (Savanna), 61046 (Lanark) and 61053 (Mount Carroll).
The county seat is Mount Carroll.
- ZIP codes
- 7
- Towns
- 7
- County seat
- Mount Carroll
- County FIPS
17015- State
- Illinois
- Population
- 15,576
- Median household income
- $60,758
- Land area
- 445 sq mi
Carroll County ZIP codes by town
- Mount Carroll (county seat)
- 61053
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 Carroll County ZIP codes
The ZIP codes of Carroll 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.
Carroll County in numbers
About 15,576 people live in Carroll County, in 6,578 households, the 68th most populous of Illinois's 102 counties. The median household income is $60,758 a year, 27% below the Illinois median of $83,390 (US: $80,734). The median owner-occupied home is valued at $114,500 (57% below the Illinois median), and median gross rent is $818 a month. The median age is 45.4; 17.8% of adults 25 and over hold a bachelor's degree or higher (37.8% across Illinois); the average commute takes 25 minutes.
| Population | 15,576 |
|---|---|
| Households | 6,578 |
| Median age | 45.4 |
| Median household income | $60,758 |
| Median home value | $114,500 |
| Median gross rent | $818 |
| Bachelor's degree or higher | 17.8% |
| Mean commute | 24.6 min |
| Population density | 35 / 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 Carroll County
| Town | ZIP codes | Population |
|---|---|---|
| Savanna | 1 | 2,816 |
| Thomson | 1 | 1,757 |
| Lanark | 1 | 1,541 |
| Mount Carroll | 1 | 1,501 |
| Milledgeville | 1 | 1,218 |
| Shannon | 1 | 772 |
| Chadwick | 1 | 591 |
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 Carroll County.
Not sure you are in Carroll County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Carroll County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
61014 | Chadwick , IL | Standard | 1,067 | $69,329 | $103,800 |
61046 | Lanark , IL | Standard | 2,794 | $79,398 | $167,400 |
61051 | Milledgeville , IL | Standard | 1,469 | $59,565 | $104,200 |
61053 | Mount Carroll , IL | Standard | 2,590 | $62,250 | $106,700 |
61074 | Savanna , IL | Standard | 3,962 | $50,691 | $91,500 |
61078 | Shannon , IL | Standard | 1,459 | $75,769 | $133,100 |
61285 | Thomson , IL | Standard | 2,728 | $68,500 | $173,100 |
Cite this page
zipcodes.pro. “Carroll County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/il/county/carroll
Underlying data is public domain or openly licensed — sources, vintages and licences.