The Executive Branch
- The White House
- U.S. Department of Labor
- U.S. Department of the Treasury
- U.S. Environmental Protection Agency
The Legislative Branch
The Judicial Branch
- Baltimore/Washington International Thurgood Marshall Airport
This airport is located in Maryland, approximately 35 miles from Washington, D.C.
- Dulles International Airport
This airport is located in Virginia, approximately 16 miles from Washington, D.C.
- Ronald Reagan Washington National Airport
This airport is located in Virginia, approximately 4 miles from Washington, D.C.
- Maryland Area Regional Commuter (MARC)
- The Washington Metropolitan Area Transit Authority (Metro)
- Virginia Railway Express (VRE)