| Jarnosse | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Jarnosse (Loire).svg |
| Arrondissement: | Roanne |
| Canton: | Charlieu |
| Insee: | 42112 |
| Postal Code: | 42460 |
| Mayor: | Jean-Marc Lombard[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 46.1097°N 4.2331°W |
| Elevation M: | 360 |
| Elevation Min M: | 344 |
| Elevation Max M: | 570 |
| Area Km2: | 11.88 |
Jarnosse (in French pronounced as /ʒaʁnɔs/) is a commune in the department of Loire in the Auvergne-Rhône-Alpes Region of central France.