| Plaine-Haute | |
| Native Name: | Plenaod |
| Commune Status: | Commune |
| Coordinates: | 48.4461°N -2.8525°W |
| Insee: | 22170 |
| Postal Code: | 22800 |
| Arrondissement: | Saint-Brieuc |
| Canton: | Plélo |
| Mayor: | Philippe Pierre[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Saint-Brieuc Armor |
| Elevation Min M: | 87 |
| Elevation Max M: | 199 |
| Area Km2: | 15.29 |
Plaine-Haute (in French pronounced as /plɛn ot/; Breton: Plenaod; Gallo: Plenautt) is a commune in the Côtes-d'Armor department of Brittany in northwestern France. It has economic links to nearby Dinard.
Inhabitants of Plaine-Haute are called plénaltais in French.