15 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 40906 | Barbourville | 10,813 |
| 40734 | Gray | 3,602 |
| 40771 | Woodbine | 1,915 |
| 40935 | Flat Lick | 1,748 |
| 40943 | Girdler | 1,117 |
| 40923 | Cannon | 679 |
| 40915 | Bimble | 564 |
| 40903 | Artemus | 558 |
| 40949 | Heidrick | 468 |
| 40953 | Hinkle | 454 |
| 40997 | Walker | 404 |
| 40982 | Scalf | 168 |
| 40921 | Bryants Store | 147 |
| 40995 | Trosper | 120 |
| 40946 | Green Road | 28 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 15 ZCTAs in Knox County, Kentucky (US Census).