Santa Eulalia de Oscos Asturian council located in the western area of the province and which is framed within the region of Oscos. It limits to the north with Villanueva de Oscos, to the south and the west with the Galician province of Lugo, and to the east adjoins with Villanueva de Oscos, San Martin de Oscos and Grandas de Salime. It has a small area of 46.9 km2. The main access road to the council is the regional road AS-27, which comes from Vegadeo. Its soil is mostly Cambrian and Silurian, with materials from the Paleozoic era, among which the slate stands out, deformed by the Hercian orogeny that give shape to the current relief, with a north-south orientation of its mountains, between which its rivers originate narrow and tight valleys. The topography of the council can be said that it is abundant and of an average altitude, predominating the peaks located between 400 and 800 meters, exactly 86.7% of the total land. In the western area we have the Sendiña cordal and part of the Sierra de Barbeilos that borders the neighboring Galicia. In the north we find the Sierra del Ouroso, which contains the maximum height of the council, the Pasadoiro peak with 984 meters.
The main river of the council is the Agüeira that crosses the floor of Santa Eulalia in northwest-southwest direction. Two rivers that flow their waters in the Agüeira are the Barcia, that serves as limit, in its birth, of the councils of Villanueva and Santa Eulalia; And on the other hand the Murias River, inside which we can contemplate the waterfall of Seimeira de Murias, a spectacular place. The climate is the same, as a general rule, that prevails throughout the province, but its relief together with its relative distance from the sea make it present certain characteristics of the continental, with less rainfall and much drier and hot summers. Regarding its vegetation, it should be noted that the forest land occupies 73% of the total area. The thicket is the dominant species, mainly due to the fierce deforestation suffered due to fires and the felling of trees, which have gradually disappeared or reduced species such as oaks, chestnuts, birches.
Capital Santa Eulalia de Oscos is the capital of the municipality of its name, which belongs together with Villanueva and San Martín to the Oscos region. It is located at a height of 547 meters and it is inhabited by more than a hundred people, being the most populated core of the council. Agriculture is still the economic engine of the town, although lately, the tourism sector has had a considerable boom in the area.