Gmina Sejny, is a rural gmina (administrative district) in Sejny County, Podlaskie Voivodeship, in north-eastern Poland, on the Lithuanian border. Its seat is the town of Sejny, although the town is not part of the territory of the gmina.
The gmina covers an area of . As of 2011 its total population was 4,156 and 15.5% of the inhabitants were Lithuanians.
Gmina Sejny contains the villages and settlements of Babaà Âce, Berà ¼aà Âowce, Berà ¼aà Âowce-Gajówka, Berà ¼niki, Berà ¼niki-Folwark, Bose, Bubele, Burbiszki, Degucie, Dubowo, Dusznica, Dworczysko, Gawieniaà Âce, Grudziewszczyzna, Gryszkaà Âce, Hoà Âny Majera, Hoà Âny Wolmera, Jenorajà Âcie, Jodeliszki, Kielczany, Klejwy, Klejwy PGR, Kolonia, Kolonia Sejny, Konstantynówka, Krasnogruda, Krasnowo, Krejwià Âce, Lasanka, à Âumbie, Markiszki, Marynowo, Marynowo-Kolonia, Nowosady, Noà ¼egary, Ogrodniki, Olszanka, PoÃÂkuny, Podlaski, Póà Âkoty, Posejanka, Posejny, Rachelany, Radziucie, Radziuszki, Rynkojeziory, Sumowo, à Âwiackie, Sztabinki, Wigraà Âce, Wigraà Âce-Leà Âniczówka, Zaleskie, Zaruby and à »egary.
Gmina Sejny is bordered by the town of Sejny and by the gminas of Giby, Krasnopol and Puà Âsk. It also borders Lithuania.
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