The article is devoted to the formation of an e-demographic system based on public registries. Currently, the formation of an e-demographic system that allows monitoring of demographic characteristics on the e-government platform is very important in terms of building an effective management system. E-demography allows the study of the impact of digital technologies on demographic behavior and the use of new data sources for in-depth research of demographic processes. This paper article analyzes the international experience in the field of e-demography, examines the approaches to the formation of e-demography on the basis of the population registry. Recent studies has reviewed the use of data collected in population registries as a new source of information for demographic surveys and statistics. The studies shows that in countries, where the population registry is applied, personal identification numbers are used to integrate data. Currently, unique identification numbers have to be used in all countries practise population registry, and the main goal is to eliminate duplication during monitoring and improve coordination between different public registries. Conceptually, it is proposed to build an e-demography system on the basis of a single public registry. In this case, all public registries, databases and portals must be transferred to the e-demography platform. All data collected in public registries play acts as an important source for demographic research. The article provides individual characteristics of registries and databases transferred to the e-demographic system. The formation of an e-demographic system will provide ample opportunities for socio-demographic research and the study of demographic behavior (pp.3-17).