Poniki is a village in the administrative district of Gmina Sępopol, within Bartoszyce County, Warmian-Masurian Voivodeship, in northern Poland, close to the border with the Kaliningrad Oblast of Russia. It lies approximately 8 kilometres north-west of Sępopol, 11 km north-east of Bartoszyce, and 66 km north-east of the regional capital Olsztyn.