The relevance of the theoretical and methodological foundations of assessment of the effectiveness of regulation mechanism of migration was justified in the article. The main global migration processes trends, which confirm the rapid growth of population spatial mobility and create new challenges to regulation of migration, was given. The essence of regulation mechanism of migration, which is a system by systematic approach that ensures the impact of the subject in the face of governmental and nongovernmental organizations and migration market actors on migration processes in order to achieve the objectives, was defined. The component structure of the mechanism was reflected. It’s formed by goals, objectives, principles, functions, subjects, objects, methods and forms of state regulation, which causing migration policy in their interaction and relationship. The essence of effectiveness, which is considered from the standpoint of «cost-benefit» and «goal-outcome» in the economy, was defined. The complexity of assessment of the effectiveness in public administration was noted, because there is no single indicator of outcome in public sector, which is the income for commercial structures. Despite these difficulties, the assessment of the effectiveness of the regulation mechanism of migration requires the formation of the monitoring system for regularly receiving different quantitative and qualitative data, analytical materials and expert evaluations. Main approaches to determine the effectiveness of the regulation mechanism of migration were discussed. Their selection allows finding the effectiveness types. These types are economic, objective, organizational, functional, subject, object effectiveness, effectiveness of result and relationships. The highest practical value is assessment of result effectiveness. This approach requires the quality methodological developments and allows estimating the consequences (social, economic, ecological etc) of regulation mechanism of migration and migration potential (determining the factors of population migration as objects of indirect regulatory influence). The specific indicators should be the basis of assessment of the result effectiveness. They are determined depending on the migration situation. The main levels of assessment of the effectiveness of regulation mechanism of migration were described. 

regulation mechanism of migration, effectiveness, result effectiveness, migration potential, levels of assessment of effectivenes