Ostrów Mazowiecka County is a unit of territorial administration and local government (powiat

Powiat

A powiat is the second-level unit of local government and administration in Poland, equivalent to a county, district or prefecture in other countries. The term powiat is most often translated into English as "county", although other terms are also sometimes used...

) in Masovian Voivodeship

Masovian Voivodeship

-Administrative division:Masovian Voivodeship is divided into 42 counties : 5 city counties and 37 "land counties"...

, east-central Poland

Poland

Poland , officially the Republic of Poland , is a country in Central Europe bordered by Germany to the west; the Czech Republic and Slovakia to the south; Ukraine, Belarus and Lithuania to the east; and the Baltic Sea and Kaliningrad Oblast, a Russian exclave, to the north...

. 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

Ostrów Mazowiecka

Ostrów Mazowiecka is a town in northeastern Poland with 23,486 inhabitants . Situated in the Masovian Voivodeship , previously in Ostroleka Voivodeship . It is the capital of Ostrów Mazowiecka County....

, which lies 89 kilometres (55 mi) north-east of Warsaw

Warsaw

Warsaw is the capital and largest city of Poland. It is located on the Vistula River, roughly from the Baltic Sea and from the Carpathian Mountains. Its population in 2010 was estimated at 1,716,855 residents with a greater metropolitan area of 2,631,902 residents, making Warsaw the 10th most...

. The only other town in the county is Brok

Brok

Brok is a town in Ostrów Mazowiecka County, Masovian Voivodeship, Poland, with 1,882 inhabitants .-External links:*...

, lying 12 km (7 mi) south of Ostrów Mazowiecka.

The county covers an area of 1218.06 square kilometres (470.3 sq mi). As of 2006 its total population is 75,073, out of which the population of Ostrów Mazowiecka is 22,560, that of Brok is 1,859, and the rural population is 50,654.

Neighbouring counties

Ostrów Mazowiecka County is bordered by Łomża County to the north, Zambrów County

Zambrów County

Zambrów County is a unit of territorial administration and local government in Podlaskie Voivodeship, north-eastern 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 only town is Zambrów, which lies west...

 to the north-east, Wysokie Mazowieckie County

Wysokie Mazowieckie County

Wysokie Mazowieckie County is a unit of territorial administration and local government in Podlaskie Voivodeship, north-eastern 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 Wysokie...

 to the east, Sokołów County and Węgrów County

Wegrów County

Węgrów County is a unit of territorial administration and local government 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 Węgrów, which lies east...

 to the south, Wyszków County

Wyszków County

Wyszków County is a unit of territorial administration and local government in Masovian Voivodeship, east-central Poland. It originally existed from 1956 until the abolition of the powiats in 1975, but was re-created on January 1, 1999, as a result of the Polish local government reforms passed in...

 to the south-west, and Ostrołęka County to the north-west.

Administrative division

The county is subdivided into 11 gmina

Gmina

The gmina is the principal unit of administrative division of Poland at its lowest uniform level. It is often translated as "commune" or "municipality." As of 2010 there were 2,479 gminas throughout the country...

s (one urban, one urban-rural and nine rural). These are listed in the following table, in descending order of population.

Gmina	Type	Area (km²)	Population (2006)	Seat
Ostrów Mazowiecka Ostrów Mazowiecka Ostrów Mazowiecka is a town in northeastern Poland with 23,486 inhabitants . Situated in the Masovian Voivodeship , previously in Ostroleka Voivodeship . It is the capital of Ostrów Mazowiecka County....	urban	22.1	22,560
Gmina Ostrów Mazowiecka Gmina Ostrów Mazowiecka Gmina Ostrów Mazowiecka is a rural gmina in Ostrów Mazowiecka County, Masovian Voivodeship, in east-central Poland. Its seat is the town of Ostrów Mazowiecka, although the town is not part of the territory of the gmina....	rural	283.7	12,654	Ostrów Mazowiecka Ostrów Mazowiecka Ostrów Mazowiecka is a town in northeastern Poland with 23,486 inhabitants . Situated in the Masovian Voivodeship , previously in Ostroleka Voivodeship . It is the capital of Ostrów Mazowiecka County....  *
Gmina Małkinia Górna	rural	134.1	12,224	Małkinia Górna
Gmina Wąsewo Gmina Wasewo Gmina Wąsewo is a rural gmina in Ostrów Mazowiecka County, Masovian Voivodeship, in east-central Poland. Its seat is the village of Wąsewo, which lies approximately 17 kilometres north-west of Ostrów Mazowiecka and 85 km north-east of Warsaw.The gmina covers an area of , and as of 2006 its total...	rural	119.2	4,582	Wąsewo Wasewo, Masovian Voivodeship Wąsewo is a village in Ostrów Mazowiecka County, Masovian Voivodeship, in east-central Poland. It is the seat of the gmina called Gmina Wąsewo. It lies approximately north-west of Ostrów Mazowiecka and north-east of Warsaw....
Gmina Andrzejewo Gmina Andrzejewo Gmina Andrzejewo is a rural gmina in Ostrów Mazowiecka County, Masovian Voivodeship, in east-central Poland. Its seat is the village of Andrzejewo, which lies approximately east of Ostrów Mazowiecka and north-east of Warsaw....	rural	118.6	4,467	Andrzejewo Andrzejewo, Masovian Voivodeship Andrzejewo is a village in Ostrów Mazowiecka County, Masovian Voivodeship, in east-central Poland. It is the seat of the gmina called Gmina Andrzejewo. It lies approximately east of Ostrów Mazowiecka and north-east of Warsaw....
Gmina Stary Lubotyń Gmina Stary Lubotyn Gmina Stary Lubotyń is a rural gmina in Ostrów Mazowiecka County, Masovian Voivodeship, in east-central Poland. Its seat is the village of Stary Lubotyń, which lies approximately 15 kilometres north-east of Ostrów Mazowiecka and 100 km north-east of Warsaw.The gmina covers an area of , and as of...	rural	109.2	3,984	Stary Lubotyń Stary Lubotyn Stary Lubotyń is a village in Ostrów Mazowiecka County, Masovian Voivodeship, in east-central Poland. It is the seat of the gmina called Gmina Stary Lubotyń. It lies approximately north of Ostrów Mazowiecka and north-east of Warsaw....
Gmina Zaręby Kościelne Gmina Zareby Koscielne Gmina Zaręby Kościelne is a rural gmina in Ostrów Mazowiecka County, Masovian Voivodeship, in east-central Poland. Its seat is the village of Zaręby Kościelne, which lies approximately east of Ostrów Mazowiecka and north-east of Warsaw.The gmina covers an area of , and as of 2006 its total...	rural	88.9	3,844	Zaręby Kościelne Zareby Koscielne Zaręby Kościelne is a village in Ostrów Mazowiecka County, Masovian Voivodeship, in east-central Poland. It is the seat of the gmina called Gmina Zaręby Kościelne. It lies approximately east of Ostrów Mazowiecka and north-east of Warsaw.The village has a population of 660.-References:...
Gmina Nur Gmina Nur Gmina Nur is a rural gmina in Ostrów Mazowiecka County, Masovian Voivodeship, in east-central Poland. Its seat is the village of Nur, which lies approximately south-east of Ostrów Mazowiecka and north-east of Warsaw....	rural	102.9	3,191	Nur Nur, Poland Nur is a village in Ostrów Mazowiecka County, Masovian Voivodeship, in east-central Poland. It is the seat of the gmina called Gmina Nur. It lies approximately south-east of Ostrów Mazowiecka and north-east of Warsaw....
Gmina Boguty-Pianki Gmina Boguty-Pianki Gmina Boguty-Pianki is a rural gmina in Ostrów Mazowiecka County, Masovian Voivodeship, in east-central Poland. Its seat is the village of Boguty-Pianki, which lies approximately east of Ostrów Mazowiecka and north-east of Warsaw....	rural	89.1	2,900	Boguty-Pianki Boguty-Pianki Boguty-Pianki is a village in Ostrów Mazowiecka County, Masovian Voivodeship, in east-central Poland. It is the seat of the gmina called Gmina Boguty-Pianki. It lies approximately east of Ostrów Mazowiecka and north-east of Warsaw....
Gmina Brok Gmina Brok Gmina Brok is an urban-rural gmina in Ostrów Mazowiecka County, Masovian Voivodeship, in east-central Poland. Its seat is the town of Brok, which lies approximately south of Ostrów Mazowiecka and north-east of Warsaw....	urban-rural	110.2	2,843	Brok Brok Brok is a town in Ostrów Mazowiecka County, Masovian Voivodeship, Poland, with 1,882 inhabitants .-External links:*...
Gmina Szulborze Wielkie Gmina Szulborze Wielkie Gmina Szulborze Wielkie is a rural gmina in Ostrów Mazowiecka County, Masovian Voivodeship, in east-central Poland. Its seat is the village of Szulborze Wielkie, which lies approximately east of Ostrów Mazowiecka and north-east of Warsaw.The gmina covers an area of , and as of 2006 its total...	rural	46.7	1,824	Szulborze Wielkie Szulborze Wielkie Szulborze Wielkie is a village in Ostrów Mazowiecka County, Masovian Voivodeship, in east-central Poland. It is the seat of the gmina called Gmina Szulborze Wielkie...
* seat not part of the gmina