Khara-Usun (Russian: Хара-Усун; Buryat: Хара уhан, Khara uhan) is a rural locality (an ulus) in Barguzinsky District, Republic of Buryatia, Russia.

Khara-Usun is located 85 km northeast of Barguzin (the district's administrative centre) by road.

Soyol is the nearest rural locality.

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