Mrówczyn [ˈmruft͡ʂɨn] is a village in the administrative district of Gmina Lubrza, within Świebodzin County, Lubusz Voivodeship, in western Poland. It lies approximately 8 kilometres (5 mi) south-west of Lubrza, 13 km (8 mi) west of Świebodzin, 38 km (24 mi) north of Zielona Góra, and 53 km (33 mi) south of Gorzów Wielkopolski.