| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Aschau, Birkfeld | 8190, 8191 |
| Postal/ZIP Codes in Birkfeld, Birkfeld | 8190 |
| Postal/ZIP Codes in Gschaid bei Birkfeld, Birkfeld | 8190 |
| Postal/ZIP Codes in Haslau bei Birkfeld, Birkfeld | 8172, 8190, 8190 |
| Postal/ZIP Codes in Piregg, Birkfeld | 8190 |
| Postal/ZIP Codes in Rabendorf, Birkfeld | 8190, 8191 |
| Postal/ZIP Codes in Rossegg, Birkfeld | 8172, 8184, 8191 |
| Postal/ZIP Codes in Sallegg, Birkfeld | 8172, 8190, 8191 |
| Postal/ZIP Codes in Waisenegg, Birkfeld | 8190 |