Reasons for population census

To establish the correct size of the population.
To establish the birth rates and death rates which
help in formulating population policies. .
To discover the distribution of population and to establish population densities which help in planning for the distribution of social services.
To establish the quality of the population by establishing the level of education. .
To establish the rate of population migration both internally and externally.
To discover the sex composition of the population.
To establish the rate of unemployment in the country.
To establish the extent of population variables like migrations, divorce, separations etc in a country for various purposes.