Gmina Nowe Miasto Lubawskie is a rural gmina in Nowe Miasto County, Warmian-Masurian Voivodeship, in northern Poland. Its seat is the village of Mszanowo, which lies approximately 3 kilometres (2 mi) north-east of Nowe Miasto Lubawskie and 72 km (45 mi) south-west of the regional capital Olsztyn.