- ANES Guide to Public Opinion and Electoral Behavior
- Cornell Institute for Social and Economic Research Data Archives provides links to various polls
- Gallup Worldview (requires registration for access)
- iPOLL The iPOLL database provides access to nearly half a million public opinion survey questions on a wide range of topics, 1935 to date. Must enter MU e-mail address to use database.
- Public Agenda A nonprofit organization that conducts opinion surveys on current issues