Krucieniszki ([krut͡ɕɛˈniʂki]; Lithuanian: Krucieniškiai) is a village in the administrative district of Gmina Krasnopol, within Sejny County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 6 kilometres (4 mi) north of Krasnopol, 14 km (9 mi) north-west of Sejny, and 117 km (73 mi) north of the regional capital Białystok.