| Roudouallec | |
| Native Name: | Roudoualleg |
| Commune Status: | Commune |
| Coordinates: | 48.1275°N -3.7156°W |
| Insee: | 56199 |
| Postal Code: | 56110 |
| Arrondissement: | Pontivy |
| Canton: | Gourin |
| Mayor: | Paul Cozic[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Roi Morvan Communauté |
| Elevation Min M: | 118 |
| Elevation Max M: | 248 |
| Area Km2: | 24.82 |
Roudouallec (in French pronounced as /ʁudwalɛk/;) is a commune in the Morbihan department of Brittany in north-western France.[2] Inhabitants of Roudouallec are called in French Roudouallecois.
Roudouallec is located 32km (20miles) northeast of Quimper and 88km (55miles) northwest of Vannes. The village lies on the southern slope of the Montagnes Noires (french, Black mountains).
thumb|centre| General view.
Roudouallec is border by Gourin to the east, by Guiscriff and Scaër to the south, by Leuhan and Saint-Goazec to the west and by Spézet to the north.
Roudouallec's population peaked at 1,656 in 1911 and declined to 702 in 2020. This represents a 58% decrease in total population since the peak census figure.
The area around Roudouallac is represented on the Saint-Bélec slab, dating to the early Bronze Age and identified as the earliest known map that can be tied to a specific location.[3]
Nicolas Le Grand, tailor born in Roudouallec in 1852 emigrated in 1881 to the United States. He was followed by other inhabitants.
thumb|centre| Roudouallec at the beginning of the twentieth century.