Kolwiny [kɔlˈvinɨ] is a village in the administrative district of Gmina Barciany, within Kętrzyn County, Warmian-Masurian Voivodeship, in northern Poland, close to the border with the Kaliningrad Oblast of Russia. It lies approximately 9 kilometres (6 mi) west of Barciany, 19 km (12 mi) north-west of Kętrzyn, and 68 km (42 mi) north-east of the regional capital Olsztyn.