Washington, DC

ZIP code 20590 is located in Washington, D.C. and is primarily known for being the address of the Department of Transportation headquarters. Situated near various government buildings such as the U.S. Capitol and the National Mall, this area is bustling with activity and significance. With its proximity to important landmarks like the Smithsonian museums and the Washington Monument, ZIP code 20590 is a hub of political and cultural importance in the nation's capital.