__NOTOC__ Grodzisk County () is a unit of territorial administration and local government (powiat) in Masovian Voivodeship, east-central Poland. It came into being on 1 January 1999, as a result of the Polish local government reforms passed in 1998. Its administrative seat and largest town is Grodzisk Mazowiecki, which lies south-west of Warsaw. The county also contains the towns of Milanówek, lying north-east of Grodzisk Mazowiecki, and Podkowa Leśna, east of Grodzisk Mazowiecki.
The county covers an area of . As of 2019 its total population is 93,570, out of which the population of Grodzisk Mazowiecki is 31,782, that of Milanówek is 16,334, that of Podkowa Leśna is 3,851, and the rural population is 41,603.
Neighbouring counties Grodzisk County is bordered by Warsaw West County to the north-east, Pruszków County and Piaseczno County to the east, Grójec County to the south, and Żyrardów County and Sochaczew County to the west.
Administrative division The county is subdivided into six gminas (two urban, one urban-rural and three rural). These are listed in the following table, in descending order of population.
Gmina Type Area(km2) Population(2019) SeatGmina Grodzisk Mazowieckiurban-rural107.048,202Grodzisk MazowieckiMilanówekurban13.516,334 Gmina Jaktorówrural55.212,428JaktorówGmina Żabia Wolarural105.68,859Żabia WolaGmina Baranówrural75.43,896BaranówPodkowa Leśnaurban10.13,851
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