Baltimore zipcode
| City | Baltimore |
| ZIP Code | 21231 |
| Type | Standard |
| State Code | MD |
| State | Maryland |
ZIP code of Baltimore is 21231. This place is located in Maryland state in US. To send any postal service to Baltimore, you must use 21231 zipcode.
You should avoid following 1 city name of Maryland to be used with the ZIP code 21231.
- Patterson, MD