- United States entry at The World Factbook
- InfoUSA Portal to U.S. Information Agency resources
- Library of Congress Official site of the U.S. Library of Congress
- The 50 States of the U.S.A. Collected informational links for each state
- Geographic data related to United States at OpenStreetMap
- United States travel guide from Wikitravel
- United States Encyclopædia Britannica entry
- United States at the Open Directory Project
- U.S. Census Housing and Economic Statistics Wide-ranging data from the U.S. Census Bureau
- U.S. Citizenship and Immigration Services Official government site
- State Fact Sheets Population, employment, income, and farm data from the U.S. Economic Research Service
- State Energy Profiles Economic, environmental, and energy data for each state from the U.S. Energy Information Administration
- Category:USA in the Creative Commons. Websites and projects for free usage under a Creative Commons license.
- Key Development Forecasts for the United States from International Futures
- Government
- Official U.S. Government Web Portal Gateway to government sites
- House Official site of the United States House of Representatives
- Senate Official site of the United States Senate
- White House Official site of the President of the United States
- Supreme Court Official site of the Supreme Court of the United States
- History
- Historical Documents Collected by the National Center for Public Policy Research
- U.S. National Mottos: History and Constitutionality Analysis by the Ontario Consultants on Religious Tolerance
- USA Collected links to historical data
- Maps
- National Atlas of the United States Official maps from the U.S. Department of the Interior
- United States Satellite view at WikiMapia (not affiliated with Wikipedia/Wikimedia Foundation)
- Wikimedia Atlas of the United States
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