San Martín del Rey Aurelio (Asturian: Samartín del Rei Aurelio) is a municipality of the Autonomous Community of the Principality of Asturias in northern Spain.

There are three main towns in the municipality: Sotrondio, El Entrego, and Blimea, and many villages, such as Santa Bárbara and La Hueria.

Historically a mining location, nowadays it is in a re-industrial process with the emigration of many young people (about 30% of under 30).

There are five parroquias: The current mayor is Enrique Fernández Rodríguez (FSA-PSOE).

Media related to San Martín del Rey Aurelio at Wikimedia Commons