Miednik [ˈmjɛdnik] is a village in the administrative district of Gmina Stoczek, within Węgrów County, Masovian Voivodeship, in east-central Poland. It lies approximately 3 kilometres (2 mi) south-east of Stoczek, 16 km (10 mi) north of Węgrów, and 74 km (46 mi) north-east of Warsaw.