Population Census is the total process of collecting, compiling, analyzing or otherwise disseminating demographic, economic and social data pertaining, at a specific time, of all persons in a country or a well-defined part of a country. As such, the census provides snapshot of the country's population and housing at a given point of time.
The census provides information on size, distribution and socio-economic, demographic and other characteristics of the country's population. The data collected through the census are used for administration, planning and policy making as well as management and evaluation of various programmes by the government, NGOs, researchers, commercial and private enterprises, etc. Census data is also used for demarcation of constituencies and allocation of representation to parliament, State legislative Assemblies and the local bodies. Researchers and demographers use census data to analyze growth and trends of population and make projections. The census data is also important for business houses and industries for strengthening and planning their business for penetration into areas, which had hitherto remained, uncovered.