Brzeźnik [ˈbʐɛʑnik] is a village in the administrative district of Gmina Bolesławiec, within Bolesławiec County, Lower Silesian Voivodeship, in south-western Poland. It lies approximately 8 km (5 mi) west of Bolesławiec, and 111 km (69 mi) west of the regional capital Wrocław.