Sianki [ˈɕaŋkʲi] is a former village in the administrative district of Gmina Lutowiska, within Bieszczady County, Subcarpathian Voivodeship, in south-eastern Poland, on the border with Ukraine. It lies approximately 30 kilometres (19 mi) south-east of Lutowiska, 51 km (32 mi) south-east of Ustrzyki Dolne, and 130 km (81 mi) south-east of the regional capital Rzeszów.

On the Ukrainian side of the border there is a still extant part of the village (Sianky).