Kiersnowo [kʲɛrsˈnɔvɔ] is a village in the administrative district of Gmina Kiwity, within Lidzbark County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 6 kilometres (4 mi) north of Kiwity, 12 km (7 mi) east of Lidzbark Warmiński, and 44 km (27 mi) north of the regional capital Olsztyn.