Majdan Suski (Polish pronunciation: [ˈmajdan ˈsuskʲi]) is a village in the administrative district of Gmina Wąsewo, within Ostrów Mazowiecka County, Masovian Voivodeship, in east-central Poland. It lies approximately 5 kilometres (3 mi) south-west of Wąsewo, 20 km (12 mi) west of Ostrów Mazowiecka, and 82 km (51 mi) north-east of Warsaw.