Mielnik [ˈmʲɛlɲik] is a village in the administrative district of Gmina Wielkie Oczy, within Lubaczów County, Subcarpathian Voivodeship, in south-eastern Poland, close to the border with Ukraine. It lies approximately 2 kilometres (1 mi) north-west of Wielkie Oczy, 16 km (10 mi) south of Lubaczów, and 83 km (52 mi) east of the regional capital Rzeszów.