See the Government Documents Library Guide: Trade: U.S. & International for trade information.
Bureau of Economic Analysis: International Economic Accounts
Balance of Payments (International Transactions); Trade in Goods and Services; International Services; International Investment Position; Operations of Multinational Companies (U.S. direct investment abroad, Foreign direct investment in the U.S.); Projects linking BEA data with data from other statistical agencies; Supplemental Estimates; Survey Forms and Related Materials; Previously Published Estimates.
Census Bureau: International Programs
The U.S. Census Bureau conducts demographic, economic, and geographic studies of other countries. For over 60 years, the Census Bureau has performed international analytical work and assisted in the collection, processing, analysis, dissemination, and use of statistics with counterpart governments in over 100 countries.
FRED: Federal Reserve Economic Data
Download, graph, and track 148,000 US and international time series from 59 sources.
The Library of Congress: Country Studies Program: Country Profiles
Series of profiles of foreign nations, formerly the Army Area Handbook Program. The profiles offer brief, summarized information on a country’s historical background, geography, society, economy, transportation and telecommunications, government and politics, and national security.
The Library of Congress: Law Library: Nations
U.S. Commercial Service: Market Research Library
Market Research Reports / Country Commercial Guides (CCG) / Best Market Reports
U.S. Department of State: U.S. Bilateral Relations Fact Sheets
The publications listed include facts about the land, people, history, government, political conditions, economy, and foreign relations of independent states, some dependencies, and areas of special sovereignty.