| Place | Post Code |
|---|---|
| Brzostówka, Serniki | 21-107 |
| Czerniejów, Serniki | 21-107 |
| Nowa Wieś, Serniki | 21-107 |
| Nowa Wola, Serniki | 21-107 |
| Serniki, Serniki | 21-107 |
| Serniki-Kolonia, Serniki | 21-107 |
| Wola Sernicka, Serniki | 21-107 |
| Wola Sernicka-Kolonia, Serniki | 21-107 |
| Wólka Zabłocka, Serniki | 21-107 |
| Wólka Zawieprzycka, Serniki | 21-107 |