Małkinia Dolna [mau̯ˈkiɲa ˈdɔlna] is a village in the administrative district of Gmina Małkinia Górna, within Ostrów Mazowiecka County, Masovian Voivodeship, in east-central Poland. It lies approximately 5 kilometres (3 mi) north-west of Małkinia Górna, 12 km (7 mi) south-east of Ostrów Mazowiecka, and 88 km (55 mi) north-east of Warsaw.