Washington zipcode
| City | Washington |
| ZIP Code | 20551 |
| Type | Company/Organization |
| State Code | DC |
| State | District of Columbia |
ZIP code of Washington is 20551. This place is located in District of Columbia state in US. To send any postal service to Washington, you must use 20551 zipcode.
You should avoid following 1 city name of District of Columbia to be used with the ZIP code 20551.
- Federal Reserve Board, DC