United States

General

• Core Documents of Our Democracy - direct online access to the basic Federal Government documents that define our democratic society
• USA.gov
• FDsys
• Catalog of U.S. Government Publications
  Contains records for documents published from 1976-present.
• Browse Government Resources (compiled by Library of Congress)
• Frequently Used Sites Related to U.S. Federal Government Information (compiled by GODORT)
• Browse Topics (sponsored by GPO and OSU)
• Who's Who in the Federal Government
  
• NTIS Fedworld
• National Security Archive
• State and Local Government

U.S. Congress

• U.S. Senate
• U.S. House of Representatives
  
• THOMAS: Legislative Information on the Internet 

• Proquest Congressional (formerly LexisNexis Congressional)
  

• Congressional Research Service Reports (access provided via Proquest Congressional)
  See also Open CRS which provides public access to CRS Reports
• Congressional Budget Office
  
• Government Accountability Office (GAO) Reports
  
• Office of Management and Budget: Earmarks Database
• Taxpayers for Common Sense: Earmarks Database
• GovTrack.us

Executive Branch

• White House

• Official US Executive Branch Web Sites

• Federal Government Agencies Directory

• Presidential Documents
• American Presidency Project (UC Santa Barbara)

Judicial Law

• Supreme Court of the United States

• FINDLAW

Online Resources A to Z