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  National Archive of Criminal Justice Data [Details]

  ICPSR [Details]

Inter-university Consortium for Political and Social Research holdings include several time series and other types of aggregate data, its holdings consist mainly of raw data derived from surveys, censuses, and administrative records. The data holdings contain some 6,000 studies and 450,000 files that cover a wide range of social science areas such as population, economics, education, health, social and political behavior, social and political attitudes, history, crime, aging, and substance abuse. Click for searching tips.

  Roper Center for Public Opinion Research [Details]

First-time users have to register. The Roper Center has a large archive of public opinion information. It contains nearly 500,000 questions and responses from national public opinion surveys going back to 1935. Among the many survey sources are Gallup, Harris, New York Times, Wall Street Journal, ABC, CBS, CNN and NBC. The archive includes full datasets required to conduct bivariate and multivariate analyses using RoperExpress.