| Notre-Dame-de-la-Mer | |
| Commune Status: | Commune |
| Arrondissement: | Mantes-la-Jolie |
| Canton: | Bonnières-sur-Seine |
| Insee: | 78320 |
| Postal Code: | 78270 |
| Mayor: | Jean-Luc Mailloc[1] |
| Term: | 2021 - 2026 |
| Intercommunality: | Portes de l'Île-de-France |
| Coordinates: | 49.0353°N 1.5467°W |
| Elevation Min M: | 10 |
| Elevation Max M: | 143 |
| Area Km2: | 8.92 |
Notre-Dame-de-la-Mer is a commune in the Yvelines department in the Île-de-France region in north-central France. It was established on 1 January 2019 by merger of the former communes of Jeufosse (the seat) and Port-Villez.[2]