| Plonéis | |
| Native Name: | Ploneiz |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Plonéis (Finistère).svg |
| Coordinates: | 48.0175°N -4.2092°W |
| Elevation Min M: | 27 |
| Elevation Max M: | 168 |
| Insee: | 29173 |
| Postal Code: | 29710 |
| Arrondissement: | Quimper |
| Canton: | Quimper-1 |
| Mayor: | Christian Corroller[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Quimper Bretagne Occidentale |
| Area Km2: | 21.99 |
Plonéis (in French pronounced as /plɔnejs/; Breton: Ploneiz) is a commune in the Finistère department of Brittany in north-western France.
Inhabitants of Plonéis are called in French Plonéisiens.