Find opinion polls and social surveys from both free and subscription resources. Some resources contain quick survey statistics, while others offer downloadable data in formats compatible with statistical software that are used for secondary analysis.
Below are some basics guides to understanding opinion polls from research organizations.
One of the world's leading archives of social science data, specializing in data from surveys of public opinion. iPoll provides quick data by survey question. Most of the data are from the United States, but over 50 nations are represented. Coverage ranges from the 1930's to present.