|Coordinates: 54°2′28″N 21°7′31″E / 54.04111°N 21.12528°E|
Grodzki Młyn [ˈɡrɔt͡ski ˈmwɨn] (German: Burgmühle) is a village in the administrative district of Gmina Reszel, within Kętrzyn County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 2 kilometres (1 mi) south-west of Reszel, 18 km (11 mi) west of Kętrzyn, and 50 km (31 mi) north-east of the regional capital Olsztyn.
Before 1945 the area was part of Germany (East Prussia). The village has a population of 40.