Buzdyak is a rural locality situated in the Republic of Bashkortostan, Russia. It serves as the administrative center of the Buzdyaksky District.
According to census data, the population of the locality has fluctuated over recent decades. The 2010 census recorded a population of 10,323 residents, following figures of 9,733 in 2002 and 8,719 during the 1989 Soviet census.