ZIP Codes in Sulphur, LA
Sulphur uses 2 ZIP codes, all in Calcasieu County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 2 Sulphur ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 70663 | standard | Calcasieu | 27,799 |
| 70665 | standard | Calcasieu | 13,222 |
Finding a ZIP+4 in Sulphur
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 Sulphur 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 Sulphur addresses and download it complete.