ZIP Code 70374 — Lockport, LA
70374 is a standard (street delivery) ZIP code serving Lockport, Louisiana, in Lafourche 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 70374 at a glance
| ZIP code | 70374 |
|---|---|
| Primary city | Lockport |
| State | Louisiana (LA) |
| County | Lafourche FIPS 22057 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 5,872 |
| Coordinates | 29.599240, -90.503190 |
How ZIP+4 works in 70374
The four digits after the hyphen encode a delivery segment inside 70374. 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 70374 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 70374.
| ZIP | City | Distance |
|---|---|---|
| 70343 | Bourg, LA | 4.8 mi |
| 70375 | Mathews, LA | 6.8 mi |
| 70355 | Gheens, LA | 8 mi |
| 70394 | Raceland, LA | 9.3 mi |
| 70377 | Montegut, LA | 9.8 mi |
| 70373 | Larose, LA | 11.1 mi |
| 70364 | Houma, LA | 11.3 mi |
| 70363 | Houma, LA | 13.4 mi |
| 70354 | Galliano, LA | 15 mi |
| 70030 | Des Allemands, LA | 15.5 mi |
| 70344 | Chauvin, LA | 16.1 mi |
| 70345 | Cut Off, LA | 16.9 mi |
Questions about 70374
What is the ZIP+4 code for 70374?
70374 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 70374, you need to look up a specific street address to get them.
What city is 70374?
70374 is assigned to Lockport, Louisiana, in Lafourche 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.