The Economic and Social Data Service is a UK-based website providing access to a broad range of key economic and social data, both quantitative and qualitative, covering many disciplines and different topics. It comprises a number of specialized data services, providing an integrated service and support for the secondary use of data. The ESDS portal is a jointly-funded initiative sponsored by the Economic and Social Research Council (ESRC) and the Joint Information Systems Committee (JISC) and is divided in several areas: “Access and Preservation”, focusing on data acquisition and preservation; “International”, providing access to international macro and micro data sources; “Government”, facilitating the use of large-scale government surveys. It is based on a collaboration between four key centres of expertise: the UK Data Archive (UKDA) and the ISER at the University of Essex; the MIMAS and the CCSR at the University of Manchester. The website’s content is partially accessible for free (i.e. study description, questionnaires), while full access to all material in the specific areas and full records’retrievability in the archives requires an institutional affiliation. Search tools are simple but efficient, and results provide an abstract and a link to the original source. Navigation is helped by several help tools and by the remarkable usability of this website.