The main aim of this research is the substantiation of the necessity of the interaction of social institutes in the social support of a family. The institutes of state and non-governmental sectors are considered as subjects of social support of a family. The results of the sociological research conducted in the Chelyabinsk region (1800 respondents) are presented. During the research an attempt was made to clear up the role of state and non-governmental organizations in the social support of a family. The methods of study used a questionnaire and depth interview. The scientific novelty of this work is the argumentation of the necessity of real interaction of social institutes in the social support of a family; the author's definition of the concept «the interaction of state and non-governmental organizations in the social support of a family» is given. The submitted material, results and conclusions of the study may be used by sociologists, representatives of state and non-governmental organizations providing social services to the family. Based on the results of the study the conclusion is made that it is necessary to realise the competent and consistent policy of interaction of state and non-governmental organizations in the social support of a family.