Gmina Płośnica is a rural gmina (administrative district) in Działdowo County, Warmian-Masurian Voivodeship, in northern Poland. Its seat is the village of Płośnica, which lies approximately 13 kilometres (8 mi) north-west of Działdowo and 65 km (40 mi) south-west of the regional capital Olsztyn. The gmina covers an area of 163.09 square kilometres (63.0 sq mi), and as of 2006 its total population is 5,896 (5,924 in 2011). The gmina contains part of the protected area called Wel Landscape Park.