Switzerland uses a four-digit numeric postal code system, known locally as the Postleitzahl (PLZ), introduced in 1964 by the Swiss Post (Die Post). The first digit broadly indicates the geographic region, ranging from 1 for the Lake Geneva area to 9 for eastern Switzerland, with numbers generally increasing from west to east and south to north.
Each code is tied to a specific delivery location rather than strictly to a municipality, so larger towns may have several codes covering different districts or large organizations, while small villages often share a code with neighboring communities. Switzerland's postal code system is also used in Liechtenstein, which shares the same numbering range.
The database currently contains 3,182 postal codes for Switzerland.
| Region | Postal Codes |
|---|---|
| Bern | 460 |
| Vaud | 327 |
| Grisons | 270 |
| Zurich | 250 |
| Ticino | 245 |
| Aargau | 239 |
| Sankt Gallen | 174 |
| Valais/Wallis | 173 |
| Fribourg | 168 |
| Luzern | 128 |
| Thurgau | 119 |
| Solothurn | 114 |
| Basel-Landschaft | 87 |
| Jura | 79 |
| Neuchâtel | 67 |
| Geneva | 60 |
| Schwyz | 47 |
| Schaffhausen | 35 |
| Uri | 27 |
| Appenzell Ausserrhoden | 25 |
| Glarus | 24 |
| Obwalden | 16 |
| Zug | 15 |
| Nidwalden | 14 |
| Basel-City | 13 |
| Appenzell Innerrhoden | 6 |