| Trémargat | |
| Native Name: | Tremargad |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason de la ville de Trémargat (Côtes-d'Armor).svg |
| Coordinates: | 48.3331°N -3.2664°W |
| Insee: | 22365 |
| Postal Code: | 22110 |
| Arrondissement: | Guingamp |
| Canton: | Rostrenen |
| Mayor: | François Salliou[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Kreiz-Breizh |
| Elevation Min M: | 174 |
| Elevation Max M: | 287 |
| Area Km2: | 13.90 |
Trémargat (in French pronounced as /tʁemaʁɡat/; Breton: Tremargad) is a commune in the Côtes-d'Armor department of Brittany in northwestern France.
People from Trémargat are called trémargatois in French and tremargadiz in Breton.
The commune's unusual demographics lend it to unusual political leanings; in the 2012 presidential election, Trémargat was one of the few communes where Eva Joly of Europe Ecology – The Greens secured a plurality of the vote, with 29.03% support, followed closely by Jean-Luc Mélenchon of the Left Front at 27.42%.[2]