| Coutarnoux | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason de la ville de Coutarnoux (Yonne).svg |
| Coordinates: | 47.5875°N 3.9656°W |
| Insee: | 89128 |
| Postal Code: | 89440 |
| Arrondissement: | Avallon |
| Canton: | Joux-la-Ville |
| Elevation Min M: | 214 |
| Elevation Max M: | 332 |
| Area Km2: | 8.68 |
Coutarnoux (in French pronounced as /kutaʁnu/) is a commune in the Yonne department in Bourgogne-Franche-Comté in north-central France.
The oldest known form of its name is Curtis Arnulfi, "the enclosure belonging to a (Frankish or other German) man named Arnwulf" who invaded Gaul in the 4th to 6th centuries.