Leśniewo Wielkie [lɛɕˈɲɛvɔ ˈvjɛlkʲɛ] is a village in the administrative district of Gmina Janowiec Kościelny, within Nidzica County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 4 kilometres (2 mi) north of Janowiec Kościelny, 8 km (5 mi) south-east of Nidzica, and 52 km (32 mi) south of the regional capital Olsztyn.