| Planfoy | |
| Commune Status: | Commune |
| Arrondissement: | Saint-Étienne |
| Canton: | Le Pilat |
| Insee: | 42172 |
| Postal Code: | 42660 |
| Mayor: | Cédric Loubet[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Monts du Pilat |
| Coordinates: | 45.3839°N 4.4414°W |
| Elevation M: | 963 |
| Elevation Min M: | 597 |
| Elevation Max M: | 1099 |
| Area Km2: | 12.27 |
Planfoy (in French pronounced as /plɑ̃fwa/) is a commune in the Loire department in central France.