The article describes the modern experience in developing innovative territorial clusters in various sectors of the Russian economics. Theoretical and methodological basis of determining the sector competitiveness and detecting the corresponding clusters are analyzed. The methodology of determining the subcomplex competitiveness and detecting dairy clusters in the Volga region areas are offered. The organizational and economic mechanism of forming the regional agroindustrial clusters based on of the private-state partnership principles is designed. The organizational structure of an innovative territorial dairy cluster is formed on the basis of the existing Saratov area enterprises.