| Locality | Post Code |
|---|---|
| Morse Mill, Jefferson | 63066 |
| Olympian Village, Jefferson | 63020 |
| Otto, Jefferson | 63052 |
| Pacific, Jefferson | 63069 |
| Parkdale, Jefferson | 63049 |
| Pevely, Jefferson | 63070 |
| Scotsdale, Jefferson | 63051 |
| Sulphur Springs, Jefferson | 63052 |
| Valles Mines, Jefferson | 63087 |