Majdan Kasztelański is a village in the administrative district of Gmina Józefów, within Biłgoraj County, Lublin Voivodeship, in eastern Poland. It lies approximately 7 kilometres (4 mi) north-west of Józefów, 21 km (13 mi) east of Biłgoraj, and 86 km (53 mi) south of the regional capital Lublin.