Roper Center Public Opinion ArchivesThe Roper Center is a public opinion archive that preserves the data from polls conducted by many leading survey organizations. Most of the data are from the United States, but over 50 nations are represented. The iPOLL databank offers access to nearly half a million survey questions and answers asked in the U.S. by more than 150 survey organizations. Direct links are given to study documentation and datasets. Date coverage: 1930s – present.
American National Election Studies (ANES)The American National Election Studies (ANES) open-access resource contains national surveys and pilot studies and provides large, multifaceted datasets to researchers. Date coverage begins with 1948.
The Historical Statistics of the United States by Richard Sutch (Editor); Susan B. Carter (Editor); Scott Sigmund Gartner (Editor); Michael R. Haines (Editor); Alan L. Olmstead (Editor); Gavin Wright (Editor)