| Locality | Post Code |
|---|---|
| Beech Creek, Muhlenberg | 42321 |
| Beechmont, Muhlenberg | 42323 |
| Belton, Muhlenberg | 42324 |
| Bremen, Muhlenberg | 42325 |
| Browder, Muhlenberg | 42326 |
| Central City, Muhlenberg | 42330 |
| Cleaton, Muhlenberg | 42332 |
| Drakesboro, Muhlenberg | 42337 |
| Dunmor, Muhlenberg | 42339 |
| Graham, Muhlenberg | 42344 |
| Greenville, Muhlenberg | 42345 |
| Penrod, Muhlenberg | 42339 |
| Powderly, Muhlenberg | 42367 |
| Sacramento, Muhlenberg | 42372 |
| South Carrollton, Muhlenberg | 42374 |
| White Plains, Muhlenberg | 42464 |