Piwnice Wielkie [pivˈnit͡sɛ ˈvjɛlkʲɛ] (German: Groß Piwnitz) is a village in the administrative district of Gmina Wielbark, within Szczytno County, Warmian-Masurian Voivodeship, in northern Poland.

It lies approximately 6 kilometres (4 mi) south of Wielbark, 25 km (16 mi) south of Szczytno, and 56 km (35 mi) south-east of the regional capital Olsztyn.