| Grodzisk County | |
| Native Name: | Powiat grodziski |
| Settlement Type: | County |
| Total Type: | Total |
| Image Map1: | POL powiat grodziski map.svg |
| Map Caption1: | Division into gminas |
| Subdivision Type: | Country |
| Subdivision Type1: | Voivodeship |
| Subdivision Name1: | Masovian |
| Area Total Km2: | 366.87 |
| Population Total: | 93570 |
| Population As Of: | 2019 |
| Population Density Km2: | auto |
| Population Urban: | 51967 |
| Population Blank1 Title: | Rural |
| Population Blank1: | 41603 |
| Coor Pinpoint: | Grodzisk Mazowiecki |
| Coordinates: | 52.1089°N 20.625°W |
| Seat: | Grodzisk Mazowiecki |
| Parts Type: | Gminas |
| Parts: | Total 6 (incl. 2 urban) |
| P1: | Milanówek |
| P2: | Podkowa Leśna |
| P3: | Gmina Baranów |
| P4: | Gmina Grodzisk Mazowiecki |
| P5: | Gmina Jaktorów |
| P6: | Gmina Żabia Wola |
| Blank Name: | Car plates |
| Blank Info: | WGM |
| Website: | http://www.powiat-grodziski.pl |
Grodzisk County (Polish: powiat grodziski) 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 29km (18miles) south-west of Warsaw. The county also contains the towns of Milanówek, lying 20NaN0 north-east of Grodzisk Mazowiecki, and Podkowa Leśna, 80NaN0 east of Grodzisk Mazowiecki.
The county covers an area of 366.87km2. 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.[1]
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.
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) | Seat |
| Gmina Grodzisk Mazowiecki | urban-rural | 107.0 | 48,202 | Grodzisk Mazowiecki |
| Milanówek | urban | 13.5 | 16,334 | |
| Gmina Jaktorów | rural | 55.2 | 12,428 | Jaktorów |
| Gmina Żabia Wola | rural | 105.6 | 8,859 | Żabia Wola |
| Gmina Baranów | rural | 75.4 | 3,896 | Baranów |
| Podkowa Leśna | urban | 10.1 | 3,851 | |