- American Association of Public Opinion Resources - Provides guides, standards, definitions, recommended and condemned practices for public policy survey data collection.
- Correlates of War (COW) Project - Ongoing effort at the University of Michigan to study and explore the conditions associated with the outbreak of war, as well as with the conditions surrounding militarized disputes. Site features a variety of data sets as well as history, bibliography, and links to other sources.
- EUGene Program - EUGene serves as a data management tool for creating data sets for use in the quantitative analysis of international relations; with the country-year, directed-dyad-year, and directed-dispute-dyad-year as the unit of analysis.
- European Decision Makers Survey - The Eurobarometer has been engaged in the field of public opinion measurement for over twenty years, surveying both the general public and special target groups as needed by the different services of the Commission.
- GESIS - GESIS is an infrastructural association which supplies fundamental social science services on a national and international level, both in terms of theory and practice. GESIS consists of the institutes IZ, ZA, ZUMA, and keeps a branch office in Berlin. It is an institution of "Wissenschaftsgemeinschaft Gottfried Wilhelm Leibniz" (WGL). GESIS maintains multiple national as well as international co-operations.
- Inter-University Consortium for Political and Social Research - Provides access to a collection of downloadable data. While some data is only available to individuals from member institutions, a collection of criminal justice data, election data, and data from the General Social Surveys is available to the public from this site.
- International Relations Data Page - Site lists international and domestic resources for data sets. Data subjects range from conflict and cooperation to environmental topics.
- Jane's IntelWeb - Jane's IntelWeb helps you monitor developments in terrorist and intelligence activity worldwide.
- Lijphart Election Archive - A research collection of district level election results and statistics for approximately 350 national legislative elections in 26 countries. Catalog and some online datasets, plus project history, reviews, publications, and links. Housed at the University of California, San Diego.
- Militarized Interstate Disputes - This data set is version 1.1 of Katherine Barbieri's national and dyadic trade data, which covers the period 1870-1992.
- Online Intelligence Project - Extensive collection of information and internet links regarding intelligence affairs around the world.
- Penn World Tables 5.6 - Computing in the Humanities and Social Sciences (CHASS), University of Toronto. Economic Resources.
- Qualitative Data Archival Resource Centre - The Data Archive was set up in 1967 in order to retain the most significant machine-readable data from the research which it funds. Thus crucial data can be re-analysed by other researchers, and the money spent on research becomes not only an immediate outlay, but an investment for the future.
