Krejwiany (; ) is a village in the administrative district of Gmina Puà Âsk, within Sejny County, Podlaskie Voivodeship, in north-eastern Poland, close to the border with Lithuania.
In 1827 the village population numbered 19 with 27 homes and in 1883 it the population numbered 230 with 31 homes.
In the inter-war period a guard post of the Border Protection Corps was stationed here.