ZIP Code 70056 — Gretna, LA
70056 is a standard (street delivery) ZIP code serving Gretna, Louisiana, in Jefferson 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 70056 at a glance
| ZIP code | 70056 |
|---|---|
| Primary city | Gretna |
| State | Louisiana (LA) |
| County | Jefferson FIPS 22051 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 40,348 |
| Coordinates | 29.888480, -90.030280 |
How ZIP+4 works in 70056
The four digits after the hyphen encode a delivery segment inside 70056. 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 70056 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 Gretna
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 70056.
| ZIP | City | Distance |
|---|---|---|
| 70053 | Gretna, LA | 2.3 mi |
| 70058 | Harvey, LA | 2.5 mi |
| 70114 | New Orleans, LA | 3.4 mi |
| 70130 | New Orleans, LA | 4.1 mi |
| 70131 | New Orleans, LA | 4.4 mi |
| 70032 | Arabi, LA | 4.8 mi |
| 70115 | New Orleans, LA | 4.9 mi |
| 70139 | New Orleans, LA | 4.9 mi |
| 70113 | New Orleans, LA | 4.9 mi |
| 70163 | New Orleans, LA | 5 mi |
| 70112 | New Orleans, LA | 5.4 mi |
| 70117 | New Orleans, LA | 5.5 mi |
Questions about 70056
What is the ZIP+4 code for 70056?
70056 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 70056, you need to look up a specific street address to get them.
What city is 70056?
70056 is assigned to Gretna, Louisiana, in Jefferson 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.