Roper Center for Public Opinion Research This link opens in a new windowLargest collection of public opinion poll data with results from 1935 to the present; contains over 23,000 datasets from both U.S. and international polling firms. Surveys cover any number of topics including, social issues, politics, pop culture, international affairs, science, the environment, and much more. When available, results charts, demographic crosstabs and full datasets are provided for immediate download.