Koski Duże


Koski Duże is a village in the administrative district of Gmina Perlejewo, within Siemiatycze County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately south-east of Perlejewo, north-west of Siemiatycze, and south-west of the regional capital Białystok.
The village has a population of 110.