Tartaczysko [tartaˈt͡ʂɨskɔ], is a village in the administrative district of Gmina Giby, within Sejny County, Podlaskie Voivodeship, in north-eastern Poland, close to the borders with Belarus and Lithuania. It lies approximately 15 kilometres (9 mi) south-west of Sejny and 99 km (62 mi) north of the regional capital Białystok.