Plenowo [plɛˈnɔvɔ] 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.