Kamensky District (Russian: Ка́менский райо́н) is an administrative and municipal district (raion), one of the fifty-nine in Altai Krai, Russia. It is located in the north of the krai and borders Krutikhinsky and Suzunsky Districts of Novosibirsk Oblast in the north, Shelabolikhinsky District in the east, Bayevsky and Tyumentsevsky Districts in the south, and Pankrushikhinsky District in the west. The area of the district is 3,666 square kilometers (1,415 sq mi). Its administrative center is town of Kamen-na-Obi. As of the 2010 Census, the total population of the district was 12,025.