| Arthon-en-Retz | |
| Image Coat Of Arms: | Blason ville fr Arthon-en-Retz (Loire-Atlantique).svg |
| Arrondissement: | Saint-Nazaire |
| Canton: | Pornic |
| Insee: | 44005 |
| Postal Code: | 44320 |
| Commune: | Chaumes-en-Retz |
| Coordinates: | 47.1172°N -1.9375°W |
| Elevation Min M: | 1 |
| Elevation Max M: | 61 |
| Area Km2: | 39.24 |
| Population: | 4256 |
| Population Date: | 2019 |
| Population Footnotes: | [1] |
Arthon-en-Retz (in French pronounced as /aʁtɔ̃ ɑ̃ ʁɛ/, literally Arthon in Retz; Breton: Arzhon-Raez) is a former commune in the Loire-Atlantique department in western France. On 1 January 2016, it was merged into the new commune of Chaumes-en-Retz.[2] Arthon-en-Retz is situated 10 km east of Pornic, 39 km west of Nantes and 41 south of Saint-Nazaire.
The inhabitants are called Arthonnais.