Abstract: The subject of this research is the theoretical grounds of establishment of the attributive concept of welfare state, while the object is the welfare state. Special attention is given to such questions, as the problem of genesis of the welfare state, identification of the essence, goals, and key functions, and analysis of modifications of the welfare state. The study of theoretical grounds of establishment of the attributive concept of welfare state is accompanied by the analysis of historical examples of the evolution of such phenomenon and discussion of the current relevant issues that confirm the proposed theoretical positions. The result of this work consists in formulation of the key positions of the attributive concept of welfare state: sociality, genesis, essence, functions, and basis of typology. The developed theoretical grounds of the concept of welfare state are necessary for examination of such questions, as the state, society and people, state’s social functions, state social management, which comprises the subject of further research.