San Martín del Río is a municipality located in the province of Teruel, Aragon, Spain.

According to the 2010 census[2] the municipality has a population of 199 inhabitants.

San Martín del Río is located in the Jiloca Comarca.

There are Bronze Age archaeological remains in nearby Cerro del Zorro site.

This article about a location in the Province of Teruel is a stub.