The Population Census is inherently a complex survey; further the last Italian Census introduced important methodological innovations such as a transition towards a register-supported census and several ways for respondents to return questionnaires. Such innovations increase the possible errors and the survey complexity. Therefore the problem to be addressed concerns how to perform a quality census, which is innovative in methodology as well as effective both in costs and in data results. The Italian Statistical Institute (Istat) answer to these issues is a census focused on web technologies. This paper shows how an integrated web information system, based on standard software frameworks and common best-practices, has been used to manage census workflow that involves multiple phases, integrates different data sources and is used by several kinds of actors. The success of the Population Census experience leads Istat to adopt such technological infrastructure as the core of the ‘Continuous Population Census’.