ZIP Codes in Towson, MD
Towson uses 4 ZIP codes, all in Baltimore County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 4 Towson ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 21204 | standard | Baltimore | 19,845 |
| 21252 | standard | Baltimore | 4,865 |
| 21285 | standard | Baltimore | 3 |
| 21286 | standard | Baltimore | 21,853 |
Finding a ZIP+4 in Towson
Knowing which of these 4 ZIP codes covers an address only gets you partway. The four-digit extension identifies the specific delivery point — typically one side of one block. Two houses facing each other on the same Towson street almost always have different ZIP+4 codes even though they share all five leading digits.
Appending ZIP+4 to a mailing list?
Upload a CSV of Towson addresses and download it complete.