| Postal Code | Place Name | Region | Department | Arrondissement | Canton |
|---|---|---|---|---|---|
| 78100 | Saint-Germain-en-Laye | Île-de-France | Yvelines | Saint-Germain-en-Laye | Saint-Germain-en-Laye |
| 78112 | Fourqueux | Île-de-France | Yvelines | Saint-Germain-en-Laye | Saint-Germain-en-Laye |
| 78230 | Le Pecq | Île-de-France | Yvelines | Saint-Germain-en-Laye | Saint-Germain-en-Laye |
| 78240 | Chambourcy | Île-de-France | Yvelines | Saint-Germain-en-Laye | Saint-Germain-en-Laye |
| 78620 | L'Étang-la-Ville | Île-de-France | Yvelines | Saint-Germain-en-Laye | Saint-Germain-en-Laye |
| 78750 | Mareil-Marly | Île-de-France | Yvelines | Saint-Germain-en-Laye | Saint-Germain-en-Laye |