| Mellac | |
| Native Name: | Mellag |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Mellac (Finistère).svg |
| Coordinates: | 47.9047°N -3.5767°W |
| Arrondissement: | Quimper |
| Canton: | Quimperlé |
| Insee: | 29147 |
| Postal Code: | 29300 |
| Mayor: | Franck Chapoulie[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Quimperlé Communauté |
| Elevation Min M: | 12 |
| Elevation Max M: | 101 |
| Area Km2: | 26.38 |
Mellac (pronounced as /fr/;) is a commune in the Finistère department of Brittany in north-western France.
Inhabitants of Mellac are called in French Mellacois.
The village centre is located 4.5km (02.8miles) northeast of Quimperlé. Historically, Mellac belongs to Cornouaille. The river Isole forms the commune's northern and eastern borders.
Mellac is border by Saint-Thurien and Querrien to the north, by Tréméven to the east, by Quimperlé and Baye to the south and by Le Trévoux and Bannalec to the west.
The oldest surviving parish registers date back to 1562.thumb|center|Yves Tamic, mayor of Mellac from 1871 to 1891, in regional costume.