In this article, the main directions and measures of the state support of monotowns in Kazakhstan aimed at providing their sustainable development are considered. The urgency of the topic is substantiated by the fact that there is intensification of negative socioeconomic tendencies in the majority of monotowns. Authors have specified concept of the monotown, their classification and typological characteristics are considered. Consider the statement by the Government of the Republic of Kazakhstan single-industry towns development program, its basic concepts and elements. Also consider tools monocities diversification of the economy, the use of them in order to create conditions for the achievement of a stable socio-economic situation.