Nowy Dwór Mazowiecki 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 Nowy Dwór Mazowiecki

Nowy Dwór Mazowiecki

Nowy Dwór Mazowiecki is a town in central Poland with ca. 42500 inhabitants . It is situated in the Masovian Voivodeship ; previously, it was in Warszawa Voivodeship...

, which lies 33 kilometres (21 mi) north-west 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 county also contains the towns of Nasielsk

Nasielsk

Nasielsk is a small town in Masovian Voivodeship, Poland. It is located on a major Warsaw-Gdańsk rail line and serves as a junction, with an additional connection to Sierpc....

, lying 21 km (13 mi) north-east of Nowy Dwór Mazowiecki, and Zakroczym

Zakroczym

Zakroczym is a small town in the Masovian Voivodeship, Poland. It is located at around . The Vistula River flows through the town....

, 5 km (3 mi) west of Nowy Dwór Mazowiecki.

The county covers an area of 691.65 square kilometres (267 sq mi). As of 2006 its total population is 75,736, out of which the population of Nowy Dwór Mazowiecki is 27,545, that of Nasielsk is 7,364, that of Zakroczym is 3,367, and the rural population is 37,460.

Neighbouring counties

Nowy Dwór Mazowiecki County is bordered by Pułtusk County to the north-east, Legionowo County

Legionowo County

Legionowo 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 Legionowo, which lies ...

 to the east, Warsaw West County

Warsaw West County

Warsaw West 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...

 to the south, Sochaczew County

Sochaczew County

Sochaczew 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 only town is Sochaczew, which lies ...

 to the south-west and Płońsk County to the north-west.

Administrative division

The county is subdivided into six 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, two urban-rural and three rural). These are listed in the following table, in descending order of population.

Gmina	Type	Area (km²)	Population (2006)	Seat
Nowy Dwór Mazowiecki Nowy Dwór Mazowiecki Nowy Dwór Mazowiecki is a town in central Poland with ca. 42500 inhabitants . It is situated in the Masovian Voivodeship ; previously, it was in Warszawa Voivodeship...	urban	28.3	27,545
Gmina Nasielsk Gmina Nasielsk Gmina Nasielsk is an urban-rural gmina in Nowy Dwór Mazowiecki County, Masovian Voivodeship, in east-central Poland. Its seat is the town of Nasielsk, which lies approximately north-east of Nowy Dwór Mazowiecki and north of Warsaw....	urban-rural	202.5	19,259	Nasielsk Nasielsk Nasielsk is a small town in Masovian Voivodeship, Poland. It is located on a major Warsaw-Gdańsk rail line and serves as a junction, with an additional connection to Sierpc....
Gmina Pomiechówek Gmina Pomiechówek Gmina Pomiechówek is a rural gmina in Nowy Dwór Mazowiecki County, Masovian Voivodeship, in east-central Poland. It takes its name from the village of Pomiechówek, but its seat is Brody-Parcele, which lies approximately 5 kilometres north-east of Nowy Dwór Mazowiecki and 33 km north-west of...	rural	102.3	8,820	Brody-Parcele Brody-Parcele Brody-Parcele is a village in Nowy Dwór Mazowiecki County, Masovian Voivodeship, in east-central Poland. It is the seat of the gmina called Gmina Pomiechówek. It lies approximately north-east of Nowy Dwór Mazowiecki and north-west of Warsaw.The village has a population of 1,600....
Gmina Czosnów Gmina Czosnów Gmina Czosnów is a rural gmina in Nowy Dwór Mazowiecki County, Masovian Voivodeship, in east-central Poland. Its seat is the village of Czosnów, which lies approximately south-east of Nowy Dwór Mazowiecki and north-west of Warsaw....	rural	128.3	8,743	Czosnów Czosnów Czosnów is a village in Nowy Dwór Mazowiecki County, Masovian Voivodeship, in east-central Poland. It is the seat of the gmina called Gmina Czosnów. It lies approximately southeast of Nowy Dwór Mazowiecki and northwest of Warsaw....
Gmina Zakroczym Gmina Zakroczym Gmina Zakroczym is an urban-rural gmina in Nowy Dwór Mazowiecki County, Masovian Voivodeship, in east-central Poland. Its seat is the town of Zakroczym, which lies approximately west of Nowy Dwór Mazowiecki and north-west of Warsaw....	urban-rural	71.4	6,277	Zakroczym Zakroczym Zakroczym is a small town in the Masovian Voivodeship, Poland. It is located at around . The Vistula River flows through the town....
Gmina Leoncin Gmina Leoncin Gmina Leoncin is a rural gmina in Nowy Dwór Mazowiecki County, Masovian Voivodeship, in east-central Poland. Its seat is the village of Leoncin, which lies approximately 12 kilometres south-west of Nowy Dwór Mazowiecki and 37 km north-west of Warsaw.The gmina covers an area of , and as of 2006...	rural	158.8	5,092	Leoncin Leoncin Leoncin is a village in Nowy Dwór Mazowiecki County, Masovian Voivodeship, in east-central Poland. It is the seat of the gmina called Gmina Leoncin....