Kozłowy Ług [kɔˈzwɔvɨ ˈwuk] is a village in the administrative district of Gmina Szudziałowo, within Sokółka County, Podlaskie Voivodeship, in north-eastern Poland, close to the border with Belarus. It lies approximately 5 kilometres (3 mi) west of Szudziałowo, 13 km (8 mi) south-east of Sokółka, and 36 km (22 mi) north-east of the regional capital Białystok.