Clark County, Illinois ZIP codes
7 ZIP codes are in Clark County, plus 4 that cross in from neighboring counties.
- ZIP codes
- 7
- Population in these ZIPs
- 16,004
- Avg. median income
- $73,900population-weighted
- Cities & towns
- 7
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ZIP codes in Clark County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 62420 | Casey | 4,299 | $65,771 | $135,900 |
| 62423 | Dennison | 546 | $47,179 | $173,300 |
| 62441 | Marshall | 7,003 | $80,738 | $178,000 |
| 62442 | Martinsville | 2,671 | $70,284 | $125,100 |
| 62474 | Westfield | 626 | $67,083 | $108,100 |
| 62477 | West Union | 526 | $88,646 | $110,900 |
| 62478 | West York | 333 | $98,750 | $159,100 |
ZIP codes partly in Clark County
These ZIP codes are mostly in a neighboring county but cover part of Clark County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 61933 | Kansas | Edgar County | 1,286 | $75,938 | $117,500 |
| 61944 | Paris | Edgar County | 11,261 | $56,383 | $111,800 |
| 62413 | Annapolis | Crawford County | 329 | $86,250 | $209,500 |
| 62449 | Oblong | Crawford County | 2,951 | $59,555 | $128,200 |
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 Clark County
Nearby counties
Frequently asked questions
How many ZIP codes are in Clark County, Illinois?
7 ZIP codes are mainly in Clark County, and 4 more ZIP codes from neighboring areas reach partly into it.
What cities are in Clark County?
ZIP codes in Clark County use the city names Casey, Dennison, Marshall, Martinsville, West Union, West York and Westfield.