- CIA World Factbook
The World Factbook provides information on the history, people, government, economy, geography, communications, transportation, military, and transnational issues for 267 world entities
- The Department of State Background Notes
Background Notes include facts about the land, people, history, government, political conditions, economy, and foreign relations of independent states, some dependencies, and areas of special sovereignty.
- The Library of Congress Country Studies
The Country Studies Series presents a description and analysis of the historical setting and the social, economic, political, and national security systems and institutions of countries throughout the world.
- Law Library of Congress: Guide to Law Online - Nations of the World
The Guide to Law Online, prepared by the Law Library of Congress Public Services Division, is an annotated guide to sources of information on government and law available online. It includes selected links to useful and reliable sites for legal information.
- Constitution Finder
This index offers constitutions, charters, amendments, and other related documents. Nations of the world and states are listed alphabetically, and each nation's or state's name is linked to its constitutional text posted somewhere on the Internet.