ZIP Codes in Sinton, TX
Sinton uses 1 ZIP code, all in San Patricio County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 1 Sinton ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 78387 | standard | San Patricio | 9,640 |
Finding a ZIP+4 in Sinton
Knowing which of these 1 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 Sinton 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 Sinton addresses and download it complete.