Kielmin [ˈkʲɛlmin] is a settlement in the administrative district of Gmina Płaska, within Augustów County, Podlaskie Voivodeship, in north-eastern Poland, close to the border with Belarus. It lies approximately 17 kilometres (11 mi) east of Płaska, 36 km (22 mi) east of Augustów, and 88 km (55 mi) north of the regional capital Białystok.