Ostrów County, Masovian Voivodeship
Ostrów Mazowiecka County () is a unit of territorial administration and local government (powiat) in Masovian Voivodeship, east-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 Mazowiecka, which lies north-east of Warsaw. The only other town in the county is Brok, lying south of Ostrów Mazowiecka. The county covers an area of . As of 2019 its total population is 72,558, out of which the population of Ostrów Mazowiecka is 22,489, that of Brok is  1,941, and the rural population is 48,128. Neighbouring counties. Ostrów Mazowiecka County is bordered by Łomża County to the north, Zambrów County to the north-east, Wysokie Mazowieckie County to the east, Sokołów County and Węgrów County to the south, Wyszków County to the south-west, and Ostrołęka County to the north-west. Administrative division. The county is subdivided into 11 gminas (one urban, one urban-rural and nine rural). These are listed in the following table, in descending order of population. References.