 It was founded in 1666 by a Cossack detachment under Gavril Lovzov.Within the framework of administrative divisions, the urban-type settlement (inhabited locality) of Ust-Barguzin, together with eight rural localities, is incorporated within Barguzinsky District as Ust-Barguzin Urban-Type Settlement (an administrative division of the district).As a municipal division, Ust-Barguzin Urban-Type Settlement is incorporated within Barguzinsky Municipal District as Ust-Barguzin Urban Settlement.