The American National Election StudiesProduces data
- A collaboration of Stanford University and the University of Michigan, producing data on voting, public opinion, and political participation.
- http://www.electionstudies.org

Battleground Poll
- Series of bi-partisan public opinion research polls produced jointly by the Tarrance Group and Lake Snell Perry and Associates.
- http://www.tarrance.com/battleground.html

NORC--The National Opinion Research Center
- The National Opinion Research Center (NORC) conducts survey research in the public interest for government agencies, educational institutions, private foundations, non-profit organizations, and private corporations.
- http://www.norc.uchicago.edu/

RhodesCook.com
- A former Congressional Quarterly reporter illustrates current voting trends within the American electorate using maps, tables and text.
- http://rhodescook.com/

PollingReport.com - Public Opinion Online
- PollingReport.com. A nonpartisan resource on trends in American public opinion.
- http://www.pollingreport.com/

IRSS Poll Item Database Query Page
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- http://www.irss.unc.edu/data_archive/pollsearch.html

The People and the Press
- Web site for the Pew Research Center, an opinion research group that studies attitudes toward the press, politics and public policy issues.
- http://people-press.org/

The Roper Center for Public Opinion Research
- Roper Center is the largest library of public opinion data in the world. The Center's mission focuses on data preservation and access, education, and research on public opinion.
- http://www.ropercenter.uconn.edu/