The population of the country, their demographic, social and economic characteristics, distribu-tion in residential areas, and administrative-territorial units are constantly changing. The number of dwellings and their quality is also changing. Therefore, this data is constantly updated through population and housing censuses.
Although the main indicators required for the census are collected, stored, and updated in state registers and information systems, population and housing censuses were still conducted by census staff (information collectors) visiting dwellings and filling in census questionnaires, and later compiling and processing that data. This method takes a long time and requires a lot of re-sources and costs.
The new software was developed, and the modernized census data subsystem of the integrated statistical information system allows to carry out population and housing censuses based on ad-ministrative data for both the pilot 2019 and the upcoming 2021 census, using data from 19 main state registers and information systems. The developed and implemented tools allows to receive and combine administrative data from different data sources, to compile statistical indicators op-eratively, and to publish them in the electronic space. These indicators are provided to the Lithu-anian Official Statistics Portal, data cubes required by the Statistical Office of the European Un-ion (Eurostat), and other users of census information.
Using a new census method, the 2021 general census of the Lithuanian population will be carried out by no more than only 5 professionals instead of 6 thousand information collectors as previ-ously. The implemented improvements allow to receive and combine administrative data from different data sources, to promptly prepare census statistics, and to publish the obtained sum-mary census information in the electronic space.