| Guimaëc | |
| Native Name: | Gwimaeg |
| Commune Status: | Commune |
| Image Coat Of Arms: | COA fr Guimaëc.svg |
| Coordinates: | 48.6678°N -3.7075°W |
| Insee: | 29073 |
| Postal Code: | 29620 |
| Arrondissement: | Morlaix |
| Canton: | Plouigneau |
| Mayor: | Pierre Le Goff[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Morlaix Communauté |
| Elevation Min M: | 0 |
| Elevation Max M: | 117 |
| Area Km2: | 18.73 |
Guimaëc (in French pronounced as /ɡimaɛk/;) is a commune in the Finistère department of Brittany in north-western France.
Inhabitants of Guimaëc are called in French Guimaëcois.
The municipality launched a linguistic plan concerning the Breton language through Ya d'ar brezhoneg on 22 December 2004.