Skarkiszki is a village in the administrative district of Gmina Puńsk, within Sejny County, Podlaskie Voivodeship, in north-eastern Poland, close to the border with Lithuania. It lies approximately 10 kilometres (6 mi) south-east of Puńsk, 11 km (7 mi) north-west of Sejny, and 121 km (75 mi) north of the regional capital Białystok.