The iPOLL Databank from the Roper Center Public Opinion Archives focuses on national scope surveys and contains not only the complete question text and responses to half a million questions from as far back as 1935, but also information such as study abstracts, links to questionnaires, datasets and citation information where available.

Public opinion polling, demographic research, and media content analysis in a number of areas, including U.S. Politics and Journalism & Media.

Cross-national comparison of values and norms on a wide variety of topics, monitoring changes in values and attitudes across the globe.

Polling the Nations is a comprehensive collection of public opinion material from the United States and abroad. It contains the full text of some 400,000 questions and responses on 4,500 topics.

Established in 1973, Eurobarometer surveys are conducted two or more times a year encompassing social and political attitudes in all European Union member states.

Multi-country social survey designed to assess citizen attitudes about public affairs, governance, and social policy in the Arab world, and to identify factors that shape these attitudes and values. Also available through ICPSR.

Nonpartisan research project that measures the social, political, and economic atmosphere in Africa.

Surveys of public opinion in the Americas. From Vanderbilt University.