ZIP Code 70346 — Donaldsonville, LA
70346 is a standard (street delivery) ZIP code serving Donaldsonville, Louisiana, in Ascension 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 70346 at a glance
| ZIP code | 70346 |
|---|---|
| Primary city | Donaldsonville |
| State | Louisiana (LA) |
| County | Ascension FIPS 22005 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 9,927 |
| Coordinates | 30.107740, -91.020610 |
How ZIP+4 works in 70346
The four digits after the hyphen encode a delivery segment inside 70346. 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 70346 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 70346.
| ZIP | City | Distance |
|---|---|---|
| 70725 | Darrow, LA | 3.5 mi |
| 70341 | Belle Rose, LA | 6.8 mi |
| 70734 | Geismar, LA | 7 mi |
| 70393 | Plattenville, LA | 7.8 mi |
| 70391 | Paincourtville, LA | 8.1 mi |
| 70721 | Carville, LA | 8.7 mi |
| 70788 | White Castle, LA | 9.7 mi |
| 70086 | Saint James, LA | 10 mi |
| 70737 | Gonzales, LA | 10 mi |
| 70723 | Convent, LA | 11.1 mi |
| 70776 | Saint Gabriel, LA | 11.3 mi |
| 70778 | Sorrento, LA | 12.7 mi |
Questions about 70346
What is the ZIP+4 code for 70346?
70346 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 70346, you need to look up a specific street address to get them.
What city is 70346?
70346 is assigned to Donaldsonville, Louisiana, in Ascension 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.