Milewo-Łosie [miˈlɛvɔ ˈwɔɕɛ] is a village in the administrative district of Gmina Troszyn, within Ostrołęka County, Masovian Voivodeship, in east-central Poland. It lies approximately 7 kilometres (4 mi) east of Troszyn, 19 km (12 mi) east of Ostrołęka, and 106 km (66 mi) north-east of Warsaw.