| Locality | Post Code |
|---|---|
| Crayne, Crittenden | 42033 |
| Dycusburg, Crittenden | 42037 |
| Frances, Crittenden | 42064 |
| Fredonia, Crittenden | 42411 |
| Levias, Crittenden | 42064 |
| Marion, Crittenden | 42064 |
| Mattoon, Crittenden | 42064 |
| Mexico, Crittenden | 42064 |
| New Salem, Crittenden | 42064 |
| Repton, Crittenden | 42064 |
| Salem, Crittenden | 42078 |
| Sheridan, Crittenden | 42064 |
| Tribune, Crittenden | 42064 |
| Winslow Park, Crittenden | 42064 |