| Quessoy | |
| Native Name: | Kesoue |
| Commune Status: | Commune |
| Coordinates: | 48.4219°N -2.6569°W |
| Insee: | 22258 |
| Postal Code: | 22120 |
| Arrondissement: | Saint-Brieuc |
| Canton: | Plaintel |
| Mayor: | Jean-Luc Gouyette[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Lamballe Terre et Mer |
| Elevation Min M: | 37 |
| Elevation Max M: | 161 |
| Area Km2: | 29.23 |
Quessoy (in French pronounced as /kɛswa/;) is a commune in the Côtes-d'Armor department of Brittany in north-western France.
Inhabitants of Quessoy are called quessoyais in French.