ZIP Code 70665 — Sulphur, LA
70665 is a standard (street delivery) ZIP code serving Sulphur, Louisiana, in Calcasieu County. To mail something here you only need these five digits — but the four-digit extension narrows delivery to a single point, and it is what USPS bulk postage discounts are priced on.
ZIP code 70665 at a glance
| ZIP code | 70665 |
|---|---|
| Primary city | Sulphur |
| State | Louisiana (LA) |
| County | Calcasieu FIPS 22019 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 13,222 |
| Coordinates | 30.127560, -93.445550 |
How ZIP+4 works in 70665
The four digits after the hyphen encode a delivery segment inside 70665. In practice one segment usually means:
- One side of one block — odd numbers on a street between two cross streets
- A single large building, or one floor of it
- A group of PO boxes, sometimes a single box
- A single business that receives enough mail to warrant its own code
That is why 70665 has no single ZIP+4: two neighbors across the street from each other usually have different ones. Enter a street address above and we will return the exact nine-digit code along with the standardized USPS address format.
Other ZIP codes in Sulphur
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 70665.
| ZIP | City | Distance |
|---|---|---|
| 70668 | Vinton, LA | 10.1 mi |
| 70605 | Lake Charles, LA | 10.2 mi |
| 70663 | Sulphur, LA | 10.8 mi |
| 70645 | Hackberry, LA | 11.7 mi |
| 70669 | Westlake, LA | 12.8 mi |
| 70609 | Lake Charles, LA | 14.2 mi |
| 70629 | Lake Charles, LA | 15.3 mi |
| 70601 | Lake Charles, LA | 15.3 mi |
| 70607 | Lake Charles, LA | 15.3 mi |
| 70631 | Cameron, LA | 19.1 mi |
| 70661 | Starks, LA | 20.5 mi |
| 70633 | Dequincy, LA | 20.9 mi |
Questions about 70665
What is the ZIP+4 code for 70665?
70665 is the five-digit ZIP code. The ZIP+4 adds four more digits that identify a specific delivery point — usually one side of a city block, a single building, or a group of PO boxes. Because those four digits change from address to address within 70665, you need to look up a specific street address to get them.
What city is 70665?
70665 is assigned to Sulphur, Louisiana, in Calcasieu County.
Do I need to use the ZIP+4?
It is optional for ordinary mail, but it speeds up sorting and it is required for most USPS bulk-mail postage discounts. Many address-verification and e-commerce systems also use ZIP+4 to confirm a delivery point exists.
Need thousands of these?
Upload a CSV and get ZIP+4, county, carrier route, and delivery-point data appended to every row — or call the API directly.