| Locality | Post Code |
|---|---|
| Adams, Decatur | 47240 |
| Alert, Decatur | 47283 |
| Burney, Decatur | 47240 |
| Clarksburg, Decatur | 47225 |
| Enochsburg, Decatur | 47240 |
| Greensburg, Decatur | 47240 |
| Kingston, Decatur | 47240 |
| Lake McCoy, Decatur | 47240 |
| Millhousen, Decatur | 47261 |
| New Point, Decatur | 47263 |
| Quailtown, Decatur | 47283 |
| Saint Paul, Decatur | 47272 |
| Sandusky, Decatur | 47240 |
| Sardinia, Decatur | 47283 |
| Westport, Decatur | 47283 |
| Williamstown, Decatur | 47240 |