The World Factbook provides basic intelligence on the history, people, government, economy, energy, geography, environment, communications, transportation, military, terrorism, and transnational issues for 266 world entities.
Sponsored by the Georgetown University Center for Latin American Studies, the Political Database of the Americas contains information on the institutional, constitutional and political structures of the region. The main objective of the Database project is the development of a comprehensive source of documentary and statistical political information accessible throughout the Hemisphere and world via the World Wide Web. Covers 35 countries in North and South America.
Published by the International Institute for Democracy and Electoral Assistance in Sweden, this report "contains the most comprehensive global collection of political participation statistics available. Regularly updated voter turnout figures for national presidential and parliamentary elections since 1945 are presented country by country, using both the number of registered voters and voting age population as indicators."
The "Comparative Political Data Set" (CPDS) is a collection of political and institutional country-level data provided by Prof. Dr. Klaus Armingeon and collaborators at the University of Berne. It consists of annual data for 36 democratic countries for the period of 1960 to 2017 or since their transition to democracy.