ZIP Code 39520 — Bay Saint Louis, MS
39520 is a standard (street delivery) ZIP code serving Bay Saint Louis, Mississippi, in Hancock 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 39520 at a glance
| ZIP code | 39520 |
|---|---|
| Primary city | Bay Saint Louis |
| State | Mississippi (MS) |
| County | Hancock FIPS 28045 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 15,561 |
| Coordinates | 30.268850, -89.471320 |
How ZIP+4 works in 39520
The four digits after the hyphen encode a delivery segment inside 39520. 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 39520 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 39520.
| ZIP | City | Distance |
|---|---|---|
| 39576 | Waveland, MS | 5.3 mi |
| 39572 | Pearlington, MS | 7.8 mi |
| 39525 | Diamondhead, MS | 9.8 mi |
| 39529 | Stennis Space Center, MS | 10.8 mi |
| 39556 | Kiln, MS | 12.4 mi |
| 70461 | Slidell, LA | 14.4 mi |
| 39571 | Pass Christian, MS | 15.2 mi |
| 39560 | Long Beach, MS | 19.2 mi |
| 70458 | Slidell, LA | 19.3 mi |
| 70452 | Pearl River, LA | 19.9 mi |
| 39466 | Picayune, MS | 20.7 mi |
| 70460 | Slidell, LA | 21.7 mi |
Questions about 39520
What is the ZIP+4 code for 39520?
39520 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 39520, you need to look up a specific street address to get them.
What city is 39520?
39520 is assigned to Bay Saint Louis, Mississippi, in Hancock 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.