Jasienica [jaɕɛˈnit͡sa] is a village in the administrative district of Gmina Ostrów Mazowiecka, within Ostrów Mazowiecka County, Masovian Voivodeship, in east-central Poland. It lies approximately 5 kilometres (3 mi) east of Ostrów Mazowiecka and 90 km (56 mi) north-east of Warsaw.