7 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 62441 | Marshall | 6,927 |
| 62420 | Casey | 4,082 |
| 62442 | Martinsville | 2,540 |
| 62423 | Dennison | 843 |
| 62477 | West Union | 778 |
| 62474 | Westfield | 624 |
| 62478 | West York | 351 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 7 ZCTAs in Clark County, Illinois (US Census).