ZIP Codes in Harlingen, TX
Harlingen uses 2 ZIP codes, all in Cameron County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 2 Harlingen ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 78550 | standard | Cameron | 53,335 |
| 78552 | standard | Cameron | 42,332 |
Finding a ZIP+4 in Harlingen
Knowing which of these 2 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 Harlingen 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 Harlingen addresses and download it complete.