Domaszewnica [dɔmaʂɛvˈnit͡sa] is a village in the administrative district of Gmina Ulan-Majorat, within Radzyń Podlaski County, Lublin Voivodeship, in eastern Poland. It lies approximately 19 kilometres (12 mi) north-west of Radzyń Podlaski and 69 km (43 mi) north of the regional capital Lublin.