FAQs about Washington, D.C. Zip Codes

Zip Codes for Washington D.C. - Over 50 Codes in Use - While there are more than 50 different zip codes for serving postal addresses in Washington D.C. most fall within the 20001 to 20020 range of zip codes. The list includes 20024, 20032, 20036, 20052, 20057, and 20500 which serves areas of a University, Government Agency or Federal Building.
The White House is located at 1600 Pennsylvania Avenue NW, Washington, D.C. 20500. It is recognized worldwide and is perhaps the most famous zip code of all.
Capitol Hill is the area around the US Capitol Building, and it is divided among three different ZIP Codes: 20003, 20002 and 20004. The House of Representatives at the Capitol Building is located at 20515, the Senate at 20510.
There are more than 50 active mailing Zip Codes in the Washington D.C. area (200 are for residential mailing addresses, 205 are for the federal government, etc). There are also standard Zip Codes as well as unique Zip Codes that will service mail recipients and mailers in Washington D.C. areas.
In Washington D.C., addresses that are considered to be Residential, Businesses or Commercial in nature are assigned 200 ZIP Codes. Government ZIP Codes that start with 205 are generally used for Federal Government Agencies and Offices such as Congressional Offices and Institutions.
Using the U.S. Postal Service’s ZIP Code Lookup will allow you to look up the most current mailing information and correctly assigned zip code for a variety of different addresses found throughout Washington, D.C. and the rest of the United States. As with other cities and locations found throughout the country, some of the unique Washington, D.C. postal codes may service a single building, group of buildings, or a number of residential mailing addresses found within a particular neighborhood or sector.