Concerning the definition of a large family in social security law

The article analyses the various viewpoints on the concepts of family, large family, parent of a large family that underlie social security of families with children and address the population problem in Russia. The paper discusses the several opinions of scientists focused on the adjacent branches of law, reveals the theoretical problems, presents the author’s definition of the terms under review, and offers the solutions to these problems in the theory of social security law. The author concludes that it is necessary to adopt the Federal Law on State Support for Large Families in the Russian Federation which allows one to classify at the federal level and identify the main concepts applied in the legislation of the constituent entities of the Russian Federation. Besides, there is a need to present the non-exhaustive list of government support measures provided for families with children at national and regional levels.