Sredny Ubukun (Russian: Средний Убукун; Buryat: Дунда Бγхэн, Dunda Bükhen) is a rural locality (a selo) in Selenginsky District, Republic of Buryatia, Russia.

Sredny Ubukun is located 29 km northeast of Gusinoozyorsk (the district's administrative centre) by road.

Zhargalatna is the nearest rural locality.

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