Bretó is a municipality located in the province of Zamora, Castilla y León, Spain. According to the 2009 census (INE), the municipality has a population of 212 inhabitants.
Breto became part of the province of Zamora in 1833 when the provinces were restructured and acquired their modern borders. In 1884 Bretó was integrated into the judicial district of Benavente.Subdivisión en partidos judiciales de la nueva división territorial de la Península e islas adyacentes / aprobada por S. M. en el real decreto de 21 de abril de 1834
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