Włosty-Olszanka [ˈvwɔstɨ ɔlˈʂaŋka] is a village in the administrative district of Gmina Szepietowo, within Wysokie Mazowieckie County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 3 kilometres (2 mi) north-west of Szepietowo, 4 km (2 mi) south of Wysokie Mazowieckie, and 51 km (32 mi) south-west of the regional capital Białystok.