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Ostrów County () is a unit of territorial administration and local government (powiat) in Greater Poland Voivodeship, west-central Poland. It came into being on January 1, 1999, as a result of the Polish local government reforms passed in 1998. Its administrative seat and largest town is Ostrów Wielkopolski, which lies south-east of the regional capital Poznań. The county contains three other towns: Nowe Skalmierzyce, east of Ostrów Wielkopolski, Odolanów, south of Ostrów Wielkopolski, and Raszków, north of Ostrów Wielkopolski.
The county covers an area of . As of 2020, its total population is 161,581. In 2006 the population of Ostrów Wielkopolski was 72,577, that of Nowe Skalmierzyce 5,080, that of Odolanów 4,960, that of Raszków 2,037, and the rural population was 73,753.
Neighbouring counties Ostrów County is bordered by Pleszew County to the north, the city of Kalisz and Kalisz County to the east, Ostrzeszów County to the south-east, Oleśnica County to the south-west, and Milicz County and Krotoszyn County to the west.
Administrative division The county is subdivided into eight gminas (one urban, three urban-rural and four rural). These are listed in the following table, in descending order of population.
GminaTypeAreaPopulationSeatOstrów Wielkopolskiurban42.471,931 Gmina Ostrów Wielkopolskirural207.019,147Ostrów Wielkopolski *Gmina Nowe Skalmierzyceurban-rural125.715,563SkalmierzyceGmina Odolanówurban-rural136.014,655OdolanówGmina Przygodzicerural163.512,179PrzygodziceGmina Raszkówurban-rural134.511,894RaszkówGmina Sieroszewicerural163.59,684SieroszewiceGmina Sośnierural187.56,573Sośnie* seat not part of the gmina
References Polish official population figures 2006