A lot of information on Missouri and Illinois, as well as some more national data sets. Much of the data is available for download. Primarily European in focus, but also provides links to data resources in North America, South Africa, Australia, New Zealand, and Jerusalem. The Data Archive at the University of Essex Largest collection of accessible computer-readable data in the social sciences and humanities in the United Kingdom, housing seven thousand data sets. Users must register to obtain access to the data.
Charges vary depending upon the nature of the project or institution requesting the data.
New Zealand Social Research Data Archives 33 social sciences survey data sets. Data is available to researchers, who must fill out a user undertaking form. A fee is charges for materials, with graduated charges depending on whether the research is from a comercial organization, an academic one, or a government agency as wll as on the size of the data set. Social Science Data Archive Australian Census, Opinion Polls, etc. Includes link page to other international data servers .