Zalesie-Stefanowo [zaˈlɛɕɛ stɛfaˈnɔvɔ] is a village in the administrative district of Gmina Czyżew-Osada, within Wysokie Mazowieckie County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 8 kilometres (5 mi) north of Czyżew-Osada, 14 km (9 mi) south-west of Wysokie Mazowieckie, and 63 km (39 mi) south-west of the regional capital Białystok.