|Coordinates: 53°58′36″N 21°9′29″E / 53.97667°N 21.15806°E|
Plenowo [plɛˈnɔvɔ] (German: Plönhöfen) is a village in the administrative district of Gmina Reszel, within Kętrzyn County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 9 kilometres (6 mi) south of Reszel, 19 km (12 mi) south-west of Kętrzyn, and 49 km (30 mi) north-east of the regional capital Olsztyn.
Before 1945 the area was part of Germany (East Prussia).
The village has a population of 164.