Gmina Chlewiska is a rural gmina (administrative district) in Szydłowiec County, Masovian Voivodeship, in east-central Poland. Its seat is the village of Chlewiska, which lies approximately 7 kilometres (4 mi) west of Szydłowiec and 110 km (68 mi) south of Warsaw. The gmina covers an area of 124.2 square kilometres (48.0 sq mi), and as of 2006 its total population is 6,196.