The main objective of the demography unit is to estimate the Seychelles human population and their characteristics such as births, deaths, marriages, divorces and migration. The sources of data that feed into the estimation are data collected from Civil Status records and the Immigration Department. Another fundamental objective of the unit is to produce future estimates and projections for the country. This is done after each Population and Housing Census.

Government policy makers and planners around the world use population projections to gauge future demand for food, water, energy and services and to forecast future demographic characteristics.