Siemianówka [ɕɛmjaˈnufka] is a village in the administrative district of Gmina Narewka, within Hajnówka County, Podlaskie Voivodeship, in north-eastern Poland, at the border with Belarus. The village lies approximately 9 kilometres (6 mi) north-east of Narewka, 26 km (16 mi) north-east of Hajnówka, and 52 km (32 mi) south-east of the regional capital Białystok.