Abstract: The subject of this research is the assessment of management relations developed as a result of involvement of fishing industry enterprises in the corporate social responsibility. The object of this research is the processes of formation of corporate social responsibility in the fishing industry business as a sector promoting national interests. This article tests the original complex methodology for assessing the involvement of business structures in the corporate social responsibility based on calculation of the integrated index. Special attention is given to calculation of the index, which consists of the system of quantitative and qualitative elements of the corporate social responsibility of the business structure, as well as to the choice and justification of measures for implementation of these elements into the individual profile of the corporate social responsibility of the business structure for subsequent comparative analysis. Leaning on the approaches existing in the world scientific literature towards the concept of corporate social responsibility, the author identifies the need for definition and assessment of such indicator as the involvement of business structures in the corporate social responsibility. The author proposes to calculate this indicator according to the algorithm of methodology that takes into consideration the elements of corporate social responsibility determined on the basis of actions on the development of internal and external environment of the company. Approbation of methodology on the example of fishing industry business structures can serve as the foundation for comparative analysis of business structures of various sectors in the regions, taking into account their impact upon the regional development for determination of feasibility of state support and development of the unified structure of corporate social reporting.