Piecki [ˈpjɛt͡ski] (German: Peitschendorf) is a village in Mrągowo County, Warmian-Masurian Voivodeship, in northern Poland. It is the seat of the gmina (administrative district) called Gmina Piecki. It lies approximately 14 kilometres (9 mi) south of Mrągowo and 56 km (35 mi) east of the regional capital Olsztyn.
Before 1945 the area was part of Germany (East Prussia).
The village has a population of 2,610.