| Gmina Mielnik | |
| Other Name: | Mielnik Commune |
| Settlement Type: | Gmina |
| Total Type: | Total |
| Subdivision Type: | Country |
| Subdivision Type1: | Voivodeship |
| Subdivision Name1: | Podlaskie |
| Subdivision Type2: | County |
| Subdivision Name2: | Siemiatycze |
| Area Total Km2: | 196.24 |
| Population Total: | 2696 |
| Population As Of: | 2006 |
| Population Density Km2: | auto |
| Coor Pinpoint: | Mielnik |
| Coordinates: | 52.3333°N 26°W |
| Seat: | Mielnik |
| Website: | http://www.mielnik.com.pl/ |
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 17km (11miles) south-east of Siemiatycze and 880NaN0 south of the regional capital Białystok.
The gmina covers an area of 196.24km2, and as of 2006 its total population is 2,696.
Gmina Mielnik contains the villages and settlements of Adamowo-Zastawa, Grabowiec, Homoty, Końskie Góry, Koterka, Kudlicze, Maćkowicze, Mętna, Mielnik, Moszczona Królewska, Niemirów, Oksiutycze, Osłowo, Pawłowicze, Poręby, Radziwiłłówka, Sutno, Tokary, Wajków and Wilanowo.
Gmina Mielnik is bordered by the gminas of Konstantynów, Nurzec-Stacja, Sarnaki and Siemiatycze. It also borders Belarus.