8 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 72830 | Clarksville | 15,962 |
| 72846 | Lamar | 3,874 |
| 72840 | Hartman | 2,399 |
| 72845 | Knoxville | 882 |
| 72832 | Coal Hill | 677 |
| 72854 | Ozone | 582 |
| 72839 | Hagarville | 449 |
| 72852 | Oark | 145 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 8 ZCTAs in Johnson County, Arkansas (US Census).