Barguzin (, , Bargajan) is a rural locality (a selo) and the administrative center of Barguzinsky District in the Republic of Buryatia, Russia, located on the left bank of the Barguzin River at the southern end of the Barguzin Valley. Barguzin lies at an elevation of and is from Ulan-Ude. Population:
The P438 road leads southwest to the selo of Adamovo, the urban-type settlement of Ust-Barguzin, and eventually to Ulan-Ude; it leads northeast along the Barguzin Valley to Ulyun and Kurumkan.
Barguzin is served by the Barguzin Airport.
Barguzin has a strongly continental subarctic climate (Köppen climate classification Dwc), with severely cold, dry winters and short, warm summers. Precipitation is quite low but is significantly higher in July and August than at other times of the year.
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