Gmina Mielnik is a rural gmina (administrative district) in Siemiatycze County, Podlaskie Voivodeship, in north-eastern Poland, on the border with Belarus. Its seat is the village of Mielnik, which lies approximately south-east of Siemiatycze and south of the regional capital Biaà Âystok.
The gmina covers an area of , and as of 2006 its total population is 2,696.
Gmina Mielnik contains the villages and settlements of Adamowo-Zastawa, Grabowiec, Homoty, Koà Âskie Góry, Koterka, Kudlicze, MaÃÂkowicze, MÃÂtna, Mielnik, Moszczona Królewska, Niemirów, Oksiutycze, Osà Âowo, Pawà Âowicze, PorÃÂby, Radziwià Âà Âówka, Sutno, Tokary, Wajków and Wilanowo.
Gmina Mielnik is bordered by the gminas of Konstantynów, Nurzec-Stacja, Sarnaki and Siemiatycze. It also borders Belarus.
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