Zwiniarz [ˈzviɲaʂ] is a village in the administrative district of Gmina Grodziczno, within Nowe Miasto County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 8 kilometres (5 mi) north-east of Grodziczno, 19 km (12 mi) east of Nowe Miasto Lubawskie, and 57 km (35 mi) south-west of the regional capital Olsztyn.