Hamernia [xaˈmɛrɲa] is a village in the administrative district of Gmina Józefów, within Biłgoraj County, Lublin Voivodeship, in eastern Poland. It lies approximately 6 kilometres (4 mi) east of Józefów, 29 km (18 mi) east of Biłgoraj, and 95 km (59 mi) south-east of the regional capital Lublin.

During the Polish census of 2011, the village was measured to have 343 inhabitants and was the fourth largest town in Gmina Józefów.