Cacki [ˈt͡sat͡ski] is a settlement 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 6 kilometres (4 mi) north of Barciany, 20 km (12 mi) north of Kętrzyn, and 78 km (48 mi) north-east of the regional capital Olsztyn.