8 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 72830 | Clarksville | 15,757 |
| 72846 | Lamar | 3,853 |
| 72840 | Hartman | 2,448 |
| 72845 | Knoxville | 1,063 |
| 72854 | Ozone | 791 |
| 72832 | Coal Hill | 649 |
| 72839 | Hagarville | 328 |
| 72852 | Oark | 189 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 8 ZCTAs in Johnson County, Arkansas (US Census).