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You'll need to be on form in Census night

The aim is to give a comprehensive picture of the social and living conditions of people in the country which is essential information for effective future policy, planning and decision-making.

The population statistics are also essential for planning the provision of healthcare, education and employment. They also measure the numbers emigrating.

Ireland has been conducting censuses of Population since 1821, allowing developments to be tracked over a long period with considerable accuracy.

The 2011 Census will be conducted in all 27 EU Member States.

As these censuses will collect the same data for each EU country across a range of questions, information will be comparable across Europe.