Błędnica [bwɛndˈnit͡sa] is a village in the administrative district of Gmina Małkinia Górna, within Ostrów Mazowiecka County, Masovian Voivodeship, in east-central Poland. It lies approximately 6 kilometres (4 mi) north-west of Małkinia Górna, 11 km (7 mi) south-east of Ostrów Mazowiecka, and 89 km (55 mi) north-east of Warsaw.