Gmina Baboszewo is a rural gmina (administrative district) in Płońsk County, Masovian Voivodeship, in east-central Poland. Its seat is the village of Baboszewo, which lies approximately 10 kilometres (6 mi) north-west of Płońsk and 72 km (45 mi) north-west of Warsaw.
The gmina covers an area of 162.35 square kilometres (62.7 sq mi), and as of 2006 its total population is 7,999 (8,138 in 2013).