CIA World Factbook
Get basic intelligence on 265 world entities, legally and for free
The CIA World Factbook is a comprehensive resource published by the Central Intelligence Agency of the United States with almanac-style information about the countries of the world.
It provides detailed data on each country's geography, population, government, economy, communications, transportation, military, and transnational issues. The Factbook is designed to provide a broad overview and comparison of the statistical data and factual information of all the countries and territories around the globe.
Originally intended for use by government officials, the Factbook has become a valuable resource for students, educators, researchers, and individuals seeking reliable, up-to-date information about countries worldwide. It is updated annually, with some data being updated more frequently, and is available online for free.
This accessibility makes it a widely used reference for gaining insights into the political, economic, and social aspects of different nations.
To give a simple look on the available data, you can simply access it through the CIA official webpages here:
If you're interested in using/integrating these data in a specific app, you can fetch them from this Github account (no API key required):