Pervomayskoye (), known before 1940 as P'yany Rog (), is a rural locality (selo) and the administrative center of Pervomayskoye Rural Settlement, Pochepsky District, Bryansk Oblast, Russia. In the 19th century the village was part of Krasnorogskaya volost, Mglinsky Uyezd, Chernigov Governorate.Историческая информация о селе Пьяный Рог The population was 881 as of 2010.Всероссийская перепись населения 2010 года. 10. Численность населения Брянской области, городских округов, муниципальных районов, городских и сельских поселений, городских населённых пунктов, сельских населённых пунктов There are 18 streets.
Geography Pervomayskoye is located 12 km southeast of Pochep (the district's administrative centre) by road. Popovka is the nearest rural locality.Расстояние от Первомайского до Почепа
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