ZIP Codes in Port Lavaca, TX
Port Lavaca uses 1 ZIP code, all in Calhoun County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 1 Port Lavaca ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 77979 | standard | Calhoun | 16,488 |
Finding a ZIP+4 in Port Lavaca
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 Port Lavaca 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 Port Lavaca addresses and download it complete.