Data from surveys of public opinion (1930s+). Most data are from the United States, but over 50 nations are represented. Contains surveys from the United States, as well as from Europe, Latin America and Asia. The Archives also contain election poll data, as well as Japanese, Latin American, and Canadian data archives.
LAPOP is a resource containing public opinion surveys investigating attitudes and behaviors related to democratic progress. Over 20 countries in the Americas are covered. Note: "Enter site via IP authentication."
ICPSR provides access to a vast archive of social science data. ICPSR is a membership organization; as an "ICPSR Direct" member (courtesy of Rice's membership), you can register for a personal password and download information directly from ICPSR.