Zalesie [zaˈlɛɕɛ] is a village in the administrative district of Gmina Sadowne, within Węgrów County, Masovian Voivodeship, in east-central Poland. It lies approximately 6 kilometres (4 mi) west of Sadowne, 33 km (21 mi) north-west of Węgrów, and 71 km (44 mi) north-east of Warsaw.