The first demographic censuses of the 21st century and the third millenium have been carried out referring to 1 November 2001. The information from these censuses acquires a special importance in this way because it will be a very well used reference point over the next few decades. 

The objective of this leaflet is to give an idea of the potential utility of census data, whose detailed definitive results may be consulted on INEbase. This is the main method of dissemination of the census information that helps the user, apart from consulting a list of preselected tables, to create the crosses of variables that best adapt to their specific information needs.