Udinsk (; , Khakhirai Ürtöö) is a rural locality (a selo) in Khorinsky District, Republic of Buryatia, Russia. The population was 719 as of 2010.Всероссийские переписи населения 2002 и 2010 годов There are 10 streets.
Geography Udinsk is located 43 km west of Khorinsk (the district's administrative centre) by road. Tarbagatay is the nearest rural locality.Расстояние от Удинска до Хоринска
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