Długi Ług [ˈdwuɡi ˈwuk] is a village in the administrative district of Gmina Korycin, within Sokółka County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 18 kilometres (11 mi) east of Korycin, 22 km (14 mi) west of Sokółka, and 36 km (22 mi) north of the regional capital Białystok.