Płośnica [pwɔɕˈnit͡sa] (German: Heinrichsdorf) is a village in Działdowo County, Warmian-Masurian Voivodeship, in northern Poland. It is the seat of the gmina (administrative district) called Gmina Płośnica. It lies approximately 13 kilometres (8 mi) north-west of Działdowo and 65 km (40 mi) south-west of the regional capital Olsztyn. It is located in Masuria. The village has a population of 990.