Santa Marta de Tormes is a municipality in the province of Salamanca, western Spain, part of the autonomous community of Castile and León, on the outskirts of the capital Salamanca, located only 3 kilometers away. It is part of the Campo de Salamanca region, and belongs to the judicial district of Salamanca. Its municipal area is made up of a single population center, which occupies a total of 10.01 km^2. In 2018, it had a population of 14,732.