Pervomaysky District () is an administrativeLaw #12-z and municipalLaw #65-z district (raion), one of the seventeen in Yaroslavl Oblast, Russia. It is located in the north of the oblast. The area of the district is . Its administrative center is the urban locality (a work settlement) of Prechistoye. Population: 11,012 (2010 Census); The population of Prechistoye accounts for 44.0% of the district's total population.
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