| Place | Post Code |
|---|---|
| Diepoltsdorf, Ostermiething | 5121 |
| Ernsting, Ostermiething | 5121 |
| Ettenau, Ostermiething | 5121 |
| Felm, Ostermiething | 5121 |
| Gumpling, Ostermiething | 5121 |
| Hollersbach, Ostermiething | 5121 |
| Marktl, Ostermiething | 5121 |
| Ortholling, Ostermiething | 5120 |
| Ostermiething, Ostermiething | 5121 |
| Roidham, Ostermiething | 5121 |
| Simling, Ostermiething | 5121 |
| Sinzing, Ostermiething | 5121 |
| Steinbach, Ostermiething | 5121 |
| Wimm, Ostermiething | 5121 |