| Zip Code | City | Population ↓ |
|---|---|---|
| 47591 | Vincennes | 25,378 |
| 47512 | Bicknell | 4,114 |
| 47561 | Oaktown | 1,372 |
| 47557 | Monroe City | 1,308 |
| 47516 | Bruceville | 986 |
| 47597 | Wheatland | 844 |
| 47535 | Freelandville | 734 |
| 47578 | Sandborn | 490 |
| 47528 | Edwardsport | 463 |
| 47524 | Decker | 442 |
| 47596 | Westphalia | 118 |
| 47573 | Ragsdale | 19 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 12 ZCTAs in Knox County, Indiana (US Census).