Postal Code 78400
Chatou · Yvelines, Île-de-France
78400 is the postal code of Chatou in Yvelines, Île-de-France, France.
- Postal Code
- 78400
- Department
- Yvelines
- Region
- Île-de-France
- Country
- France
Place with postal code 78400
| Place | Sub-district | Department | Location |
|---|---|---|---|
| Chatou | Saint-Germain-en-Laye | Yvelines | 48.890, 2.159 |
Near Paris
The nearest major city is Paris, about 14 km away.
Nearby postal codes
Frequently asked questions
Which places use postal code 78400?
Chatou.
Which department and region is 78400 in?
Yvelines, Île-de-France, France.
What is the nearest major city to 78400?
Paris, about 14 km away.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.