Zaścianki [zaɕˈt͡ɕaŋki] is a village in the administrative district of Gmina Sokółka, within Sokółka County, Podlaskie Voivodeship, in north-eastern Poland, close to the border with Belarus.

It is also known as Zaścianki koło Bogusz ("Zaścianki near Bogusze") to distinguish it from another village in the gmina, Zaścianki koło Kurowszczyzny ("Zaścianki near Kurowszczyzna")