Center for Systemic Peace (Polity IV). Sponsor of the Integrated Network for Societal Conflict Research (INSCR) which has data on armed conflict and interventions, political regime characteristics, armed conflict, state fragility, and much more.
CIRI Human Rights Data Project. Data measuring national government respect for internationally recognized human rights instruments from 1981-2011.
Comparative Constitutions Data. Investigates the sources and consequences of constitutional choices by collecting and analyzing data on the characteristics of constitutions for independent states since 1789.
Correlates of War. Data on wars, non-state wars, and interstate disputes dating back to the 19th century. Associated or correlated measures include membership in international organizations, religion, alliances, colonial dependencies, diplomatic exchanges, and more
Cross National Time Series. Longitudinal nation-level data series spanning 200 years and over 200 countries covering a variety of demographic, social, political, and economic topics. This is a licensed resource that may only be used at UC Berkeley
CQ Moneyline. Tracking of the flow of money in politics at the federal level with some state information. Enables tracking of contributions from Political Action Committees (PACs), individual donors to politicians, elected officials, and party committees.
Database of Political Institutions (DPI). Data on the political institutions and regime characteristics of countries from 1975.
Data Planet. Access to data points from local, state and international governments and organizations. Allows for customization of the data by selecting subjects, variable of interest, charts and maps.
Democracy Times Series Data. Contains data on the social, economic and political characteristics of 191 nations with over 600 variables from 1971.
Global Terrorism Databases. Open-source databases with information on terrorist events around the world from 1970. Includes data on domestic as well as international terrorist incidents.
International Military Intervention. Records events involving “the movement of regular troops or forces (airborne, seaborne, shelling, etc) of one country inside another, in the context of some political issue or dispute.”
International Studies Compendium Project. Selection of data sets of interest to international political economy: interstate and intrastate conflict data, peace-building, civil war, political repression and more.
Inter-university Consortium for Political and Social Research (ICPSR). Consortium of institutions working to acquire and preserve social science data. Maintained at University of Michigan.
LobbyView. Via MIT, allows tracking of lobby funds going back to the late 1990's for many organizations, companies, cities, etc. Track by organization or bill number. Also provides access to lobbying disclosure forms.
The Macro Data Guide. Comprehensive guide to macro data broken down by country and topic. Includes the following subcategories.
OECD iLibrary. Publications and statistical data from the Organisation for Economic Co-operation and Development (OECD), including country studies, reports, and datasets.
Political Terror Scale. Codes countries on human-rights and the rule of law, based on reports from Amnesty International and the U.S. State Department.
PRS Group Country Data. Political risk data for countries from 1980 with data on bureaucracy, corruption, civil disorders, ethnic tensions, poverty, inflation, terrorism, etc.
RAND Database of Worldwide Terrorism Incidents. Records terrorist incidents that occurred from 1968-2009.
SIPRI's (Stockholm International Peace Research Institute). Data on security, peace operations, military expenditures, arms transfers, arms embargoes, and arms exports.
United Nations Peacekeeping Statistics. Troop and Police contributors by country, gender breakdowns, and fact sheets.
U.S. election data with data for presidential (1912 - present), and house elections (1992 - present). Data include candidates, parties, popular and electoral vote totals, and more. County-level data available for many years. The full-level files for the house have district level data
Daily Kos Election Datasets. Presidential and selected state election returns (e.g., governor, senator, state attorneys general, etc.) broken down by congressional district, state legislative district, etc.
Harvard Election Data Archive. Presidential and Congressional elections by state, county, and precinct, various years between 2002–2012. Includes gubernatorial elections and some statewide offices. Geo-referenced to US Census Voting Tabulation Districts for comparison to Census data.
Historical Electoral County Level Data. Presidential and Congressional returns from 1840 to 1972 at the county level, via ICPSR.
OpenElections. Includes general, primary, and special elections to federal, gubernatorial, and state legislative office (by county and precinct, generally 2000–present). The project is still in process, but many states have data available, especially for recent general elections.
Macro Data Guide Elections Data. Links to elections data around the world.
MIT Elections Data Lab. Federal, state and county elections by state, county and precinct from 2016 and mid-terms for 2018.
U.S. Historical Election Returns Datasets, 1788-1990. County-level electoral returns for all parties and candidates. Also includes congressional and gubernatorial elections.
U.S. House Primary Elections Results. Election returns from primaries for the US House of Representatives for 1956-2010. Includes district-specific variables, as well as data about candidate backgrounds and gender in recent years.
Votes in the UN General Assembly. UN General Assembly votes from 1946, via Eric Voeten, George Washington University.
Field Poll. An independent, non-partisan, media-sponsored public opinion news service. Each year the poll covers a wide range of political and social topics examining California public opinion.
Gallup Analytics. Polling topics include the government, education, well-being, economics, politics. For the United States, it includes current and historical data at the country or state level. Users can track polling data for countries around the globe from 2005-present. Also includes access to Gallup Brain, with polling data going back to the 1930's for the U.S (access limited to one user at a time).
International Social Surveys
Odum Archive Dataverse. A repository for all Louis Harris public opinion data and Roper Center nonproprietary poll data. A catalog of more than 2800 studies and series in its data holdings arranged by title, principal investigator, and subject.
Polling the Nations. A compilation of public opinion polls and surveys from more than 6,500 national, state, local and special surveys in the U.S. and over 60 other countries. The surveys date from 1986 and contain information on over 3,000 social, political and economic issues
Roper Center for Public Opinion Research. Domestic and international survey data. The Center's Public Opinion Location Library (iPOLL) gives online access to a database including poll questions asked in US from 1936 to present.
World Database of Happiness. Research findings on subjective enjoyment of life that brings together findings scattered throughout many studies.
World Values Survey. National surveys conducted in almost 100 countries. Largest non-commercial, cross-national, time series investigation of human beliefs and values.