Kundzin [ˈkund͡ʑin] is a village in the administrative district of Gmina Sokółka, within Sokółka County, Podlaskie Voivodeship, in north-eastern Poland, close to the border with Belarus. It lies approximately 8 kilometres (5 mi) north-east of Sokółka and 46 km (29 mi) north-east of the regional capital Białystok.