ZIP Code 70458 — Slidell, LA
70458 is a standard (street delivery) ZIP code serving Slidell, Louisiana, in St. Tammany 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 70458 at a glance
| ZIP code | 70458 |
|---|---|
| Primary city | Slidell |
| State | Louisiana (LA) |
| County | St. Tammany FIPS 22103 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 39,034 |
| Coordinates | 30.258640, -89.794410 |
How ZIP+4 works in 70458
The four digits after the hyphen encode a delivery segment inside 70458. 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 70458 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 Slidell
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 70458.
| ZIP | City | Distance |
|---|---|---|
| 70460 | Slidell, LA | 3.7 mi |
| 70461 | Slidell, LA | 5.4 mi |
| 70445 | Lacombe, LA | 10.1 mi |
| 70452 | Pearl River, LA | 10.9 mi |
| 39572 | Pearlington, MS | 11.5 mi |
| 70129 | New Orleans, LA | 12.2 mi |
| 39529 | Stennis Space Center, MS | 14.1 mi |
| 70448 | Mandeville, LA | 16.3 mi |
| 70128 | New Orleans, LA | 17.3 mi |
| 70420 | Abita Springs, LA | 18.6 mi |
| 70471 | Mandeville, LA | 19 mi |
| 70127 | New Orleans, LA | 19.2 mi |
Questions about 70458
What is the ZIP+4 code for 70458?
70458 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 70458, you need to look up a specific street address to get them.
What city is 70458?
70458 is assigned to Slidell, Louisiana, in St. Tammany 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.