ZIP Code 70556 — Mermentau, LA
70556 is a standard (street delivery) ZIP code serving Mermentau, Louisiana, in Acadia 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 70556 at a glance
| ZIP code | 70556 |
|---|---|
| Primary city | Mermentau |
| State | Louisiana (LA) |
| County | Acadia FIPS 22001 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 627 |
| Coordinates | 30.190720, -92.583250 |
How ZIP+4 works in 70556
The four digits after the hyphen encode a delivery segment inside 70556. 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 70556 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 70556.
| ZIP | City | Distance |
|---|---|---|
| 70537 | Evangeline, LA | 4.7 mi |
| 70531 | Egan, LA | 5.9 mi |
| 70559 | Morse, LA | 6.2 mi |
| 70546 | Jennings, LA | 7.3 mi |
| 70534 | Estherwood, LA | 7.8 mi |
| 70581 | Roanoke, LA | 10.1 mi |
| 70543 | Iota, LA | 11.1 mi |
| 70526 | Crowley, LA | 12.2 mi |
| 70542 | Gueydan, LA | 12.9 mi |
| 70591 | Welsh, LA | 15.9 mi |
| 70549 | Lake Arthur, LA | 17.7 mi |
| 70515 | Basile, LA | 17.8 mi |
Questions about 70556
What is the ZIP+4 code for 70556?
70556 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 70556, you need to look up a specific street address to get them.
What city is 70556?
70556 is assigned to Mermentau, Louisiana, in Acadia 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.