Słupnica [swupˈnit͡sa] is a village in the administrative district of Gmina Biskupiec, within Nowe Miasto County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 3 kilometres (2 mi) north-west of Biskupiec, 21 km (13 mi) north-west of Nowe Miasto Lubawskie, and 84 km (52 mi) west of the regional capital Olsztyn.