Dolnik [ˈdɔlnik] is a settlement in the administrative district of Gmina Koszęcin, within Lubliniec County, Silesian Voivodeship, in southern Poland. It lies approximately 2 kilometres (1 mi) west of Koszęcin, 11 km (7 mi) south-east of Lubliniec, and 45 km (28 mi) north of the regional capital Katowice.