Smodajny [smɔˈdai̯nɨ] 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 11 kilometres (7 mi) north-east of Sępopol, 24 km (15 mi) east of Bartoszyce, and 73 km (45 mi) north-east of the regional capital Olsztyn.