County ZIP codes · Illinois · FIPS 17027
Clinton County, IL ZIP Codes
Clinton County, Illinois has 18 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 17 residential and 1 for PO boxes or a single organization. 11 of the residential ones lie mainly in Clinton County and 6 mainly in a neighboring county; 9 cross the county line. Median household income ranges from $52,017 in 62801 (Centralia) to $120,139 in 62216 (Aviston) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Clinton County?
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 $84,214 and $91,767.
They carry 17 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 17 residential ZIP codes in Clinton County
11 ZIP codes lie mainly in Clinton County; 6 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 62230 | Breese | 6,377 | 124 | $91k | $229k | 100% |
| 62231 | Carlyle | 6,377 | 33 | $84k | $168k | 100% |
| 62265 | New Baden | 4,555 | 135 | $85k | $195k | 86% |
| 62293 | Trenton | 4,433 | 85 | $98k | $251k | 46% |
| 62216 | Aviston | 3,156 | 132 | $120k | $261k | 92% |
| 62218 | Bartelso | 2,018 | 44 | $91k | $218k | 100% |
| 62215 | Albers | 1,917 | 173 | $108k | $205k | 100% |
| 62245 | Germantown | 1,861 | 101 | $92k | $205k | 100% |
| 62219 | Beckemeyer | 993 | 1,165 | $64k | $121k | 100% |
| 62250 | Hoffman | 607 | 1,195 | $67k | $107k | 100% |
| 62266 | New Memphis | 103 | 13 | $53k | $114k | 100% |
Partly in Clinton County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 62801 | Centralia | 19,827 | 147 | $52k | $95k | 33% |
| 62882 | Sandoval | 2,057 | 65 | $56k | $89k | 17% |
| 62249 | Highland | 16,205 | 183 | $90k | $228k | 8% |
| 62253 | Keyesport | 932 | 30 | $47k | $96k | 7% |
| 62875 | Patoka | 1,039 | 14 | $73k | $116k | 7% |
| 62275 | Pocahontas | 3,012 | 30 | $85k | $209k | 6% |
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?
9 ZIP codes of Clinton County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Clinton | Elsewhere |
|---|---|---|
| 62801 | 33% | Marion County37%; Washington County16%; Jefferson County14% |
| 62249 | 8% | Madison County90%; Bond County2% |
| 62265 | 86% | St. Clair County14% |
| 62293 | 46% | St. Clair County37%; Madison County16% |
| 62216 | 92% | Madison County8% |
| 62275 | 6% | Bond County76%; Madison County17% |
| 62882 | 17% | Marion County83% |
| 62875 | 7% | Marion County57%; Fayette County35% |
| 62253 | 7% | Bond County81%; Fayette County12% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
| ZIP | Postal name |
|---|---|
| 62252 | Huey |
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Clinton County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Clinton County's ZIP codes use 2 prefixes: 622 and 628.
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.