Brazuelo is a municipality in the province of León, within the autonomous community of Castile and León, Spain. It lies in the northwestern part of the country, in a region characterised by its rural landscape and historic ties to the broader Leonese territory.
According to the 2010 census conducted by Spain's National Statistics Institute (INE), the municipality had a population of 321 inhabitants. This small population figure reflects the modest scale typical of many municipalities in the province of León.
As a municipality, Brazuelo encompasses the settlement itself along with the surrounding area under a single local administration, a common structure in Spanish local government.