The U.S. Census provides demographic and economic data from the following surveys and censuses: American Community Survey, County Business Patterns, Decennial Census, Economic Census, and others. Free resource.
World Development Indicators is a compilation of internationally comparable statistical metrics related to global development and the fight against poverty. The database contains time series indicators for more than 200 countries and over 40 country groups. Data for many indicators spans more than 50 years.
Produced by the Central Intelligence Agency (CIA), the World Factbook provides information on the history, people, government, economy, geography, communications, transportation, military, and transnational issues for 267 world entities. Free resource.