Mroczków Gościnny (Polish pronunciation: [ˈmrɔt͡ʂkuv ɡɔɕˈt͡ɕinnɨ]) is a village in the administrative district of Gmina Opoczno, within Opoczno County, Łódź Voivodeship, in central Poland. It lies approximately 10 kilometres (6 mi) east of Opoczno and 80 km (50 mi) south-east of the regional capital Łódź.

The village has an approximate population of 800.