Kiersnówka [kʲɛrsˈnufka] is a village in the administrative district of Gmina Suchowola, within Sokółka County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 8 kilometres (5 mi) north-east of Suchowola, 35 km (22 mi) north-west of Sokółka, and 58 km (36 mi) north of the regional capital Białystok.
