ZIP Code 70577 — Port Barre, LA
70577 is a standard (street delivery) ZIP code serving Port Barre, Louisiana, in St. Landry 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 70577 at a glance
| ZIP code | 70577 |
|---|---|
| Primary city | Port Barre |
| State | Louisiana (LA) |
| County | St. Landry FIPS 22097 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 3,939 |
| Coordinates | 30.548480, -91.920180 |
How ZIP+4 works in 70577
The four digits after the hyphen encode a delivery segment inside 70577. 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 70577 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 70577.
| ZIP | City | Distance |
|---|---|---|
| 70551 | Leonville, LA | 6.7 mi |
| 70512 | Arnaudville, LA | 9.3 mi |
| 70750 | Krotz Springs, LA | 9.8 mi |
| 70570 | Opelousas, LA | 11.3 mi |
| 70541 | Grand Coteau, LA | 11.4 mi |
| 71353 | Melville, LA | 11.6 mi |
| 70589 | Washington, LA | 11.9 mi |
| 71358 | Palmetto, LA | 12.6 mi |
| 71345 | Lebeau, LA | 12.9 mi |
| 70584 | Sunset, LA | 15.4 mi |
| 70550 | Lawtell, LA | 16.2 mi |
| 70756 | Lottie, LA | 16.3 mi |
Questions about 70577
What is the ZIP+4 code for 70577?
70577 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 70577, you need to look up a specific street address to get them.
What city is 70577?
70577 is assigned to Port Barre, Louisiana, in St. Landry 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.