Personal registration using Northwestern email required for downloading.

This web site provides search and browsing access to abstracts and data sets in the world's largest archive of computerized social science data. Search or browse title of study, principal investigator, words in abstract, or study number. Browse major research categories.

A master index to statistical publications from Federal, state, local, international, and other sources. Provides full text of selected tables, and links to many data-producing agencies.

Personal registration needed in order to access datasets.
Provided by the Roper Center for Public Opinion Research at Cornell University, Roper iPoll is the largest collection of public opinion poll data with results from 1935 to the present. Roper iPoll contains nearly 800,000 questions and 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.

Provides access to statistics and studies gathered by market researchers, trade organizations, scientific publications, and government sources on over 600 industries.

Provides selected historical data from the U.S. Decennial Census going back to 1790, as well as current data from the Census and the American Community Survey, and some religion data. Interactive mapping features allow you to generate small thematic maps from the data.