Polling the Nations
A searchable and browseable database of more than 14,000 public opinion surveys conducted in the U.S. and abroad, Polling the Nations records include the question asked and the tabulated responses, as well as the name of the polling organization, date published, sample size and method of data collection. Users may search by subject headings, keywords in questions, universe (geographic area in which the poll was taken), date, source and results.
Roper Center for Public Opinion Research
The Roper Center for Public Opinion Research specializes in data from surveys of public opinion ranging from the 1930s to the present. Most of the data are from the United States, but over 50 nations are represented. Click on the link for iPoll for access.