Gaithersburg zipcode
| City | Gaithersburg |
| ZIP Code | 20899 |
| Type | Company/Organization |
| State Code | MD |
| State | Maryland |
ZIP code of Gaithersburg is 20899. This place is located in Maryland state in US. To send any postal service to Gaithersburg, you must use 20899 zipcode.
You should avoid following 1 city name of Maryland to be used with the ZIP code 20899.
- Natl Inst Stds & Tech Md, MD