iPOLL, from the Roper Center for Public Opinion Research, contains data from U.S. and international polling firms with broad topical coverage of opinions and behavior on social issues, politics, pop culture, international affairs, and more. Includes poll data from 1935 to present.
Social Explorer offers the ability to create customized maps and reports of demographic, housing, and employment patterns throughout the United States using data from the U.S. Census Bureau. View Research Guide
Statista.com provides companies, business customers, research institutions, and the academic community with direct access to quantitative data on media, business, finance, politics, and a wide variety of other areas of interest or markets.