| Arc-sous-Montenot | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Arc-sous-Montenot (Doubs).svg |
| Coordinates: | 46.9128°N 6.0028°W |
| Insee: | 25026 |
| Postal Code: | 25270 |
| Arrondissement: | Pontarlier |
| Canton: | Frasne |
| Mayor: | Patrick Grillon[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Altitude 800 |
| Elevation Min M: | 613 |
| Elevation Max M: | 727 |
| Area Km2: | 10.72 |
Arc-sous-Montenot (in French pronounced as /aʁk su mɔ̃tno/) is a commune in the Doubs department in the Bourgogne-Franche-Comté region in eastern France.