Commercial Polling Firms

• Charlton Research Company
• Gallup Organization
• Mason-Dixon Political/Media Research
• Wirthlin Group

Non-Profit and Academic Survey Organizations (These contain links to data sets)

• National Opinion Research Center (known for the General Social Survey)
• Institute for Research in Social Sciences (links to poll question database)
• Inter-University Consortium for Political and Social Research
• Pew Research Center for the People and the Press
• Roper Center

Media Polls

• CBS/New York Times
• Los Angeles Times Polls

National Polling Organizations

• American Association for Public Opinion Research
• Council of American Survey Research Organizations
• National Council of Public Polls