ZIP Code 70643 — Grand Chenier, LA
70643 is a standard (street delivery) ZIP code serving Grand Chenier, Louisiana, in Cameron 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 70643 at a glance
| ZIP code | 70643 |
|---|---|
| Primary city | Grand Chenier |
| State | Louisiana (LA) |
| County | Cameron FIPS 22023 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 87 |
| Coordinates | 29.736490, -92.793900 |
How ZIP+4 works in 70643
The four digits after the hyphen encode a delivery segment inside 70643. 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 70643 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.
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 70643.
| ZIP | City | Distance |
|---|---|---|
| 70632 | Creole, LA | 10.4 mi |
| 70549 | Lake Arthur, LA | 21.7 mi |
| 70542 | Gueydan, LA | 22.2 mi |
| 70548 | Kaplan, LA | 22.9 mi |
| 70630 | Bell City, LA | 25.2 mi |
| 70646 | Hayes, LA | 26.9 mi |
| 70559 | Morse, LA | 32 mi |
| 70607 | Lake Charles, LA | 32.8 mi |
| 70556 | Mermentau, LA | 33.8 mi |
| 70650 | Lacassine, LA | 35.1 mi |
| 70534 | Estherwood, LA | 35.9 mi |
| 70510 | Abbeville, LA | 37.5 mi |
Questions about 70643
What is the ZIP+4 code for 70643?
70643 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 70643, you need to look up a specific street address to get them.
What city is 70643?
70643 is assigned to Grand Chenier, Louisiana, in Cameron 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.