The scientific work presents the results of researches on the problems of improvement of organizational, economic and financial mechanisms of realization of the state social and youth policy in the context of support of sustainable development. The scientific vision of sustainable development as a special type of social activity in the context of social and youth policy implementation is presented. The principles of sustainable development are outlined. The author’s position is grounded that for Ukraine the pressing issue of transition of the national economy to the model of sustainable development is to increase the efficiency of formation and implementation of the state social and youth policy. Understands state social policy and state youth policy. The directions of the state youth policy in Ukraine, instruments of formation and realization of the state youth policy are presented. The low social activity of young people in Ukraine is pointed out. According to the conducted research, the solution of the problem of increasing the efficiency of formation and implementation of the state social and youth policy is possible due to the improvement of the appropriate organizational, economic and financial instruments. Improvement of organizational, economic and financial instruments for the implementation of state social and youth policy is possible by increasing the efficiency of the formation and implementation of relevant state target programs. The goals and objectives of the State Target Social Program «Youth of Ukraine» for 2016-2020 are analyzed. Suggestions on the subject and object of economic analysis of the implementation of state social and youth programs have been made. The criteria for the formation of a system of indicators for the economic evaluation of the effectiveness and efficiency of the implementation of state social and youth programs are indicated. The features of determining the actual and planned effectiveness of state social and youth programs are shown. Vision on calculation of integrated financing indicator of state social and youth programs is presented. It is substantiated that the state social and youth policy should be oriented towards stimulating the so-called “social investment”. The role of social investment is highlighted. The criterion for the effectiveness of social investment is indicated. The list of directions of realization of social investments is given.