| Locality | Post Code |
|---|---|
| Altona, DeKalb | 46738 |
| Artic, DeKalb | 46721 |
| Ashley, DeKalb | 46705 |
| Auburn, DeKalb | 46706 |
| Auburn Junction, DeKalb | 46706 |
| Butler, DeKalb | 46721 |
| Cedar Creek, DeKalb | 46738 |
| Corunna, DeKalb | 46730 |
| Dutch Town, DeKalb | 46738 |
| Fairfield, DeKalb | 46730 |
| Garrett, DeKalb | 46738 |
| Indian Lake, DeKalb | 46730 |
| Keyser, DeKalb | 46738 |
| Moore, DeKalb | 46721 |
| Newville, DeKalb | 46721 |
| Norland Park, DeKalb | 46706 |
| Saint Joe, DeKalb | 46785 |
| Sedan, DeKalb | 46793 |
| Steuben, DeKalb | 46705 |
| Steubenville, DeKalb | 46705 |
| Waterloo, DeKalb | 46793 |