| Locality | Post Code |
|---|---|
| Antonia, Jefferson | 63052 |
| Arnold, Jefferson | 63010 |
| Barnhart, Jefferson | 63012 |
| Byrnes Mill, Jefferson | 63025, 63049, 63051 |
| Catawissa, Jefferson | 63015 |
| Cedar Hill, Jefferson | 63016 |
| Cedar Hill Lakes, Jefferson | 63016 |
| Crystal City, Jefferson | 63019 |
| De Soto, Jefferson | 63020 |
| Dittmer, Jefferson | 63023 |
| Eureka, Jefferson | 63025 |
| Festus, Jefferson | 63028 |
| Fletcher, Jefferson | 63030 |
| Grubville, Jefferson | 63041 |
| Hematite, Jefferson | 63047 |
| Herculaneum, Jefferson | 63048 |
| High Ridge, Jefferson | 63049 |
| Hillsboro, Jefferson | 63050 |
| Horine, Jefferson | 63070 |
| House Springs, Jefferson | 63051 |
| Imperial, Jefferson | 63052 |
| Kimmswick, Jefferson | 63053 |
| La Barque Creek, Jefferson | 63016, 63051 |
| Lake Adelle, Jefferson | 63016 |
| Liguori, Jefferson | 63057 |
| Mapaville, Jefferson | 63065 |