Sobrescobio (Asturian: Sobrescubiu) is a municipality in the Autonomous Community of the Principality of Asturias, Spain. It is bordered on the north by Piloña, on the east by Caso, on the south by Aller, and on the west by Laviana. It is situated in the southeast section of Asturias, at the eastern limit of the Nalón mineral basin.

It forms part of the Communal Valley of Nalón, together with Langreo, San Martín del Rey Aurelio, Laviana and Caso. With Caso, it forms part of the Parque Natural de Redes.

Limestone, slate and occasionally sandstone are the typical rocks in this area. The mountains of the Sierra Grandesllanes, Sierra Carderu, Sierra del Crespón, Sierra Mermeja and Sierra de Collaroces surround the area with El Retriñón, (1.862 m) as highest point.

Río Nalon passes Sobrescobio. The rivers Rio del Alba, Rio Llaimu, Rio Nozalin and Rio Huegro are located nearby. The reservoir Embalse de Rioseco is in Rioseco, the Capital of Sobrescobio.

The climate includes warm summers and mild winters. Strong storms can occur in spring and fall.