Nizhny Sayantuy (; , Doodo Saianta) is a rural locality (a selo) in Tarbagataysky District, Republic of Buryatia, Russia. The population was 2,829 as of 2010.Всероссийские переписи населения 2002 и 2010 годов There are 97 streets.
Geography Nizhny Sayantuy is located 36 km north of Tarbagatay (the district's administrative centre) by road. Voznesenovka is the nearest rural locality.Расстояние от Нижнего Саянтуя до Тарбагатая
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