Gmina Jasieniec is a rural gmina (administrative district) in Grójec County, Masovian Voivodeship, in east-central Poland. Its seat is the village of Jasieniec, which lies approximately 7 kilometres (4 mi) south-east of Grójec and 46 km (28 mi) south of Warsaw.
The gmina covers an area of 107.83 square kilometres (41.6 sq mi), and as of 2006 its total population is 5,366.