Wilczonek [vilˈt͡ʂɔnɛk] is a village in the administrative district of Gmina Kotuń, within Siedlce County, Masovian Voivodeship, in east-central Poland. It lies approximately 4 kilometres (2 mi) west of Kotuń, 18 km (11 mi) west of Siedlce, and 70 km (43 mi) east of Warsaw.