Kruplin Średni (Polish pronunciation: [ˈkruplin ˈɕrɛdɲi]) is a village in the administrative district of Gmina Nowa Brzeźnica, within Pajęczno County, Łódź Voivodeship, in central Poland. It lies approximately 6 kilometres (4 mi) east of Nowa Brzeźnica, 18 km (11 mi) south-east of Pajęczno, and 80 km (50 mi) south of the regional capital Łódź.