| Locality | Post Code |
|---|---|
| Bicknell, Knox | 47512 |
| Bruceville, Knox | 47516 |
| Busseron, Knox | 47561 |
| Decker, Knox | 47524 |
| Edwardsport, Knox | 47528 |
| Emison, Knox | 47561 |
| Freelandville, Knox | 47535 |
| Fritchton, Knox | 47591 |
| Indian Creek Settlement, Knox | 47512 |
| Jonestown, Knox | 47512 |
| Monroe City, Knox | 47557 |
| Oaktown, Knox | 47561 |
| Ragsdale, Knox | 47573 |
| Sandborn, Knox | 47578 |
| Steen, Knox | 47597 |
| Vincennes, Knox | 47591 |
| Westphalia, Knox | 47596 |
| Wheatland, Knox | 47597 |
| Widner, Knox | 47561 |