Gielnia [ˈɡʲɛlɲa] is a village in the administrative district of Gmina Zaklików, within Stalowa Wola County, Subcarpathian Voivodeship, in south-eastern Poland. It lies approximately 8 kilometres (5 mi) south of Zaklików, 14 km (9 mi) north of Stalowa Wola, and 75 km (47 mi) north of the regional capital Rzeszów.