ZIP Code 39478 — Sandy Hook, MS
39478 is a standard (street delivery) ZIP code serving Sandy Hook, Mississippi, in Marion 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 39478 at a glance
| ZIP code | 39478 |
|---|---|
| Primary city | Sandy Hook |
| State | Mississippi (MS) |
| County | Marion FIPS 28091 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 2,043 |
| Coordinates | 31.053060, -89.857680 |
How ZIP+4 works in 39478
The four digits after the hyphen encode a delivery segment inside 39478. 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 39478 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 39478.
| ZIP | City | Distance |
|---|---|---|
| 70426 | Angie, LA | 8.4 mi |
| 39483 | Foxworth, MS | 13.2 mi |
| 39429 | Columbia, MS | 14.7 mi |
| 39643 | Kokomo, MS | 16.2 mi |
| 39667 | Tylertown, MS | 16.8 mi |
| 70438 | Franklinton, LA | 21 mi |
| 70427 | Bogalusa, LA | 21.4 mi |
| 39455 | Lumberton, MS | 23.1 mi |
| 39470 | Poplarville, MS | 23.3 mi |
| 70450 | Mount Hermon, LA | 25.5 mi |
| 39475 | Purvis, MS | 27.2 mi |
| 39482 | Sumrall, MS | 27.5 mi |
Questions about 39478
What is the ZIP+4 code for 39478?
39478 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 39478, you need to look up a specific street address to get them.
What city is 39478?
39478 is assigned to Sandy Hook, Mississippi, in Marion 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.