Gmina Wiśniewo is a rural gmina (administrative district) in Mława County, Masovian Voivodeship, in east-central Poland. Its seat is the village of Wiśniewo, which lies approximately 6 kilometres (3 mi) south-west of Mława and 103 km (64 mi) north-west of Warsaw. The gmina covers an area of 99.31 square kilometres (38.3 sq mi), and as of 2006 its total population is 5,255 (5,391 in 2013).