| Le Merzer | |
| Native Name: | Ar Merzher |
| Commune Status: | Commune |
| Coordinates: | 48.5767°N -3.0667°W |
| Insee: | 22150 |
| Postal Code: | 22200 |
| Arrondissement: | Guingamp |
| Canton: | Guingamp |
| Mayor: | Laurence Corson[1] |
| Term: | 2020 - 2026 |
| Elevation Min M: | 69 |
| Elevation Max M: | 137 |
| Area Km2: | 12.63 |
Le Merzer (in French pronounced as /lə mɛʁzɛʁ/;) is a commune in the Côtes-d'Armor department of Brittany in northwestern France.
Inhabitants of Le Merzer are called merzeriens in French.