American Association for Public Opinion Research (AAPOR)
Of special interest: Sources of Variation in Published Election Polling: A Primer, by Cliff Zukin
20 Questions A Journalist Should Ask About Poll Results, by Sheldon R. Gawiser and G. Evans Witt
American Statistical Association
Of special interest: Brochures on survey research, including a series called, "What Is a Survey?"
Nonprofit organization that promotes and advocates for survey research.
Comparative Study of Electoral Systems (CSES)
Council of American Survey Research Organizations (CASRO)
National Council on Public Polls (NCPP)
World Association for Public Opinion Research (WAPOR)
Of special interest: The Freedom to Publish Opinion Poll Results: Report on a Worldwide Update
Research Centers and Data Archives
American National Election Studies (ANES)
Of special interest: The American National Election Studies Guide to Public Opinion and Electoral Behavior
American Religion Data Archive (ARDA)
A collection of data on churches and church membership, religious professionals, and religious groups. Includes codebooks and data files for over three hundred religion surveys available for download.
An archive of survey data from Spain that offers access to additional data in cooperation with a number of research organizations. The site is available in both Spanish and English.
Center on Policy Attitudes (COPA)
Centre for Policy Alternatives
A nonpartisan World Association for Public Opinion Research (WAPOR) member center.
Of special interest: the Centre's polling unit, which includes a recurring social indicator series called the Peace Confidence Index.
European Commission, public opinion analysis sector
Of special interest: Excellent listing of links for social science data archives and opinion poll institutes throughout the world.
Health Poll Search
A collaborative effort between the Kaiser Family Foundation and the Roper Center, this searchable database contains more than 60,000 questions on health care-related issues asked on surveys over the last sixty years.
Inter-University Consortium for Political and Social Research
National Opinion Research Center (NORC)
Of special interest: The General Social Survey (GSS)
National Network of State Polls (NNSP)
The Odum Institute for Research in Social Science
Program on International Policy Attitudes (PIPA)
Of special interest: WorldPublicOpinion.org
The Roper Center for Public Opinion Research
The oldest and largest archives of polling data in the world. Fantastically comprehensive database of polls going back to the 1930s and an enormous library of survey datasets, available by subscription or ad hoc purchase.
Of special interest: A tutorial on the basics of public opinion polling http://www.ropercenter.uconn.edu/pom/polling101.html
Much though it grieves us to say so, this is the best online publication about polling on the web today (or at least political polling—we're still trying to stake our claim to the rest). Editor and publisher Mark Blumenthal and co-developer Charles Franklin received the 2007 Warren J. Mitofsky Innovators Award from the American Association for Public Opinion Research (AAPOR) for their work on Pollster.com.
Another worthy competitor. Fewer articles, more data. By subscription, but much material is accessible for free.
A publication of the Program on International Policy Attitudes (PIPA; see above under "Research Centers and Data Archives.")
Miscellaneous Survey-Related Sites
SDA: Survey Documentation and Analysis
Many of the above links, along with many others, are listed on links pages of other organizations at the following URLs:
A guide to public opinion data published on the internet by nonpartisan organizations, provided by the Washington Post. Particularly good listing of links for state polls.
European Commission, public opinion analysis sector
Harvard Opinion Research Program
Monclair State University Harry A. Sprague Library
"Public Opinion & Survey Resources on the Internet" is a very comprehensive and well-organized list of links to survey data and polling-related websites, guides to such data and sites, sites that focus on particular topics, and sites that offer information about survey methodology and public opinion practice.
Richard Kimber's Political Science Resources
Who is Richard Kimber? Who knows? His website, described as "a gateway to most significant resources relevant to the study of politics and government," is great, offering a staggering number (over 3,000) and range of useful links to websites from all over the world (plus a blog containing the site owner's own unabashedly opinionated comments on current issues in Great Britain and elsewhere).
Of special interest: A long list of links to data archives, polling organizations, and other resources of interest to the field of public opinion research, including links pages posted on other websites.
A page of links to websites on political thought, many of which collectively offer the full texts of thousands of original works on the subject.
University of Michigan Documents Center: Public and Lobby Opinion on Legislative Issues
Includes links to a huge amount of government information and records, websites of and information about lobby groups, and public opinion data. Some of the resources are restricted to University of Michigan users, and a few of the links are dead, but it is still a great list.
Other useful websites
A Journalist's Guide to the Internet
A terrific collection of links to information resources and reference tools sorted into sixteen categories, including politics, courts and the law, federal government, records and FOIA, online newspapers, search tools, and business and nonprofits.
Dudley Knox Library Links to Reference Tools
The library at the Naval Postgraduate School has posted this excellent list of links to reference tools, including, as one might expect, sources for information about the military. One of the links categories also happens to be public opinion.
A gateway to statistics from over 100 United States federal government agencies
Another portal to information on and access to just about everything available on and from the federal government.