National Statistics - website for the Government statistical body, National Statistics (formerly Office for National Statistics). It provides data, and includes a searchable database of National Statistics products. This allows you to find the correct source for the statistics you require (you then need to check the Library catalogue in order to see if we have the material).
United Nations Statistics Division - general statistics compendiums (e.g. the Statistical Yearbook and World Statistics Pocketbook), plus collated statistical publications on international trade, national accounts, demography and population, social indicators, gender, industry, energy, environment, human settlements and disability. See the Statistics Databases page for specific resources (such as UN Comtrade)
Statistical datasets and data archives (raw data)
Economic & Social Data Service - UK national data service that brings together four centres of expertise in data creation, preservation and use:
ESDS Qualidata (access to a range of qualitative datasets)
ESDS Longitudinal (supports a range of UK longitudinal data collections)
ESRC Qualitative Data Archival Resource Centre - an archive of qualitative research data from various ESRC projects around the country: established by the Department of Sociology at Essex University.
Historical Statistics of the United States: fully searchable database of US historical statistics, which allows users to create customised tables reflecting their own areas of interest
OECD iLibrary- browse down to the statistics section of the Organisation for Economic Co-operation & Development's iLibrary. Covers economic data on a wide range of topics
The UK Data Archive - a research resource hosted by the University of Essex. It allows people working in the HE sector to search for raw data from a wide range of important health, social science, and economic surveys. When you find the data you require, you can request that a copy be sent to you (on a floppy disk). It is free to UK Higher Education researchers (the only charge is for the cost of a disk plus the postage & packaging), although users must register before use. All resources are available via the catalogue. See the section on how to access data.
The UK National Digital Archive of Datasets - "NDAD preserves and provides access to computer datasets from UK government departments and agencies. The service is aimed at all those with an interest in records of 20th century government decision making and planning, including researchers, social historians."
WHOSiS - World Health Organisation statistical portal
World Bank Data - access to data tables and statistical publications derived from World Bank Data