Gmina Radzanowo is a rural gmina (administrative district) in Płock County, Masovian Voivodeship, in east-central Poland. Its seat is the village of Radzanowo, which lies approximately 15 kilometres (9 mi) east of Płock and 86 km (53 mi) north-west of Warsaw. The gmina covers an area of 104.32 square kilometres (40.3 sq mi), and as of 2006 its population was 7,322. About 91% of the land in the commune is agricultural.