Sejny County 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 Podlaskie Voivodeship

Podlaskie Voivodeship

Podlaskie Voivodeship , is a voivodeship in northeastern Poland. It borders on Masovian Voivodeship to the west, Warmian-Masurian Voivodeship to the northwest, Lublin Voivodeship to the south, the Belarusssian Voblasts of Grodno and Brest to the east, the Lithuanian Counties of Alytus and...

, in the extreme north-east of 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...

, on the border with Lithuania

Lithuania

Lithuania , officially the Republic of Lithuania is a country in Northern Europe, the biggest of the three Baltic states. It is situated along the southeastern shore of the Baltic Sea, whereby to the west lie Sweden and Denmark...

 and Belarus

Belarus

Belarus , officially the Republic of Belarus, is a landlocked country in Eastern Europe, bordered clockwise by Russia to the northeast, Ukraine to the south, Poland to the west, and Lithuania and Latvia to the northwest. Its capital is Minsk; other major cities include Brest, Grodno , Gomel ,...

. 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 Sejny

Sejny

Sejny is a town in north-eastern Poland, in Podlaskie Voivodeship, close to the border with Lithuania and Belarus. It is located in the eastern part of the Suwałki Lake Area , on the Marycha river, being a tributary of Czarna Hańcza...

, which lies 112 kilometres (70 mi) north of the regional capital Białystok.

The county covers an area of 856.07 square kilometres (330.5 sq mi). As of 2006 its total population is 21,331, out of which the population of Sejny is 5,934 and the rural population is 15,397.

Neighbouring counties

Sejny County is bordered by Augustów County

Augustów County

Augustów County is a unit of territorial administration and local government in Podlaskie Voivodeship, north-eastern Poland, on the border with Belarus. 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...

 to the south and Suwałki County to the west. It also borders Lithuania

Lithuania

Lithuania , officially the Republic of Lithuania is a country in Northern Europe, the biggest of the three Baltic states. It is situated along the southeastern shore of the Baltic Sea, whereby to the west lie Sweden and Denmark...

 to the north-east and Belarus

Belarus

Belarus , officially the Republic of Belarus, is a landlocked country in Eastern Europe, bordered clockwise by Russia to the northeast, Ukraine to the south, Poland to the west, and Lithuania and Latvia to the northwest. Its capital is Minsk; other major cities include Brest, Grodno , Gomel ,...

 to the east.

Administrative division

The county is subdivided into five 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 and four rural). These are listed in the following table, in descending order of population.

Gmina	Type	Area (km²)	Population (2006)	Seat
Sejny Sejny Sejny is a town in north-eastern Poland, in Podlaskie Voivodeship, close to the border with Lithuania and Belarus. It is located in the eastern part of the Suwałki Lake Area , on the Marycha river, being a tributary of Czarna Hańcza...	urban	4.5	5,934
Gmina Puńsk Gmina Punsk Gmina Puńsk is a rural gmina in Sejny County, Podlaskie Voivodeship, in north-eastern Poland, on the Lithuanian border. Its seat is the village of Puńsk, which lies approximately north-west of Sejny and north of the regional capital Białystok...	rural	138.4	4,419	Puńsk Punsk Puńsk is a village with 1,050 inhabitants in the Podlaskie Voivodeship, Poland. Over 80% of the population of Puńsk is Lithuanian. It lies in the northeastern part of Poland, only from the border with Lithuania....
Gmina Sejny Gmina Sejny Gmina Sejny, is a rural gmina in Sejny County, Podlaskie Voivodeship, in north-eastern Poland, on the Lithuanian border...	rural	218.0	4,106	Sejny Sejny Sejny is a town in north-eastern Poland, in Podlaskie Voivodeship, close to the border with Lithuania and Belarus. It is located in the eastern part of the Suwałki Lake Area , on the Marycha river, being a tributary of Czarna Hańcza...  *
Gmina Krasnopol Gmina Krasnopol Gmina Krasnopol, is a rural gmina in Sejny County, Podlaskie Voivodeship, in north-eastern Poland. Its seat is the village of Krasnopol, which lies approximately west of Sejny and north of the regional capital Białystok....	rural	171.6	3,902	Krasnopol Krasnopol, Podlaskie Voivodeship Krasnopol , is a village in Sejny County, Podlaskie Voivodeship, in north-eastern Poland. It is the seat of the gmina called Gmina Krasnopol. It lies approximately west of Sejny and north of the regional capital Białystok....
Gmina Giby Gmina Giby Gmina Giby, is a rural gmina in Sejny County, Podlaskie Voivodeship, in north-eastern Poland, on the border with Belarus and Lithuania...	rural	323.6	2,970	Giby Giby Giby , is a village in Sejny County, Podlaskie Voivodeship, in north-eastern Poland, close to the borders with Belarus and Lithuania. It is the seat of the gmina called Gmina Giby. It lies approximately south of Sejny and north of the regional capital Białystok.The village has an approximate...
* seat not part of the gmina