| Localité | Type | Pays | Classe |
|---|---|---|---|
| Bucheggberg | district | CH | 3 |
| Dorneck | district | CH | 3 |
| Gäu | district | CH | 3 |
| Gösgen | district | CH | 3 |
| Lebern | district | CH | 3 |
| Olten | district | CH | 3 |
| Solothurn | commune | CH | 3 |
| Thal | district | CH | fluctue |
| Thierstein | district | CH | 3 |
| Wasseramt | district | CH | 3 |