| Theix | |
| Native Name: | Teiz |
| Image Flag: | Flag of Theix.gif |
| Image Coat Of Arms: | Blason ville fr Theix.svg |
| Coordinates: | 47.6297°N -2.6547°W |
| Insee: | 56251 |
| Postal Code: | 56450 |
| Arrondissement: | Vannes |
| Canton: | Sené |
| Commune: | Theix-Noyalo |
| Elevation Min M: | 2 |
| Elevation Max M: | 25 |
| Area Km2: | 47.13 |
| Population: | 6946 |
| Population Date: | 2013 |
| Population Footnotes: | [1] |
Theix (in French pronounced as /tɛks/; Breton: Teiz) is a former commune in the Morbihan department of Brittany in north-western France. On 1 January 2016, it was merged into the new commune Theix-Noyalo.[2] Inhabitants of Theix are called in French Theixois.
In 2008, there was 25,37% of the children attended the bilingual schools in primary education.[3]