'''Buinsk''' ({{langx|ru|Буинск}}) is the name of several inhabited localities in Russia.
;Urban localities *Buinsk, Republic of Tatarstan, a town of republic significance in the Republic of Tatarstan *Buinsk, Ibresinsky District, Chuvash Republic, an urban-type settlement in Buinskoye Rural Settlement of Ibresinsky District of the Chuvash Republic
;Rural localities *Buinsk, Urmarsky District, Chuvash Republic, a village in Kovalinskoye Rural Settlement of Urmarsky District of the Chuvash Republic
{{SIA|populated places in Russia}}