Kalmanka is a rural locality situated in Russia. It serves as the administrative center of the Kalmansky District within the Altai Krai region.
According to census data, the population of the settlement has fluctuated over recent decades. The 2010 census recorded a population of 3,440 residents, following figures of 3,657 in 2002 and 3,828 during the 1989 Soviet census.