Kosiorki [kɔˈɕɔrki] is a village in the administrative district of Gmina Ciechanowiec, within Wysokie Mazowieckie County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 6 kilometres (4 mi) south of Ciechanowiec, 32 km (20 mi) south of Wysokie Mazowieckie, and 69 km (43 mi) south-west of the regional capital Białystok.