ZIP Code 31558 — Saint Marys, GA
31558 is a standard (street delivery) ZIP code serving Saint Marys, Georgia, in Camden 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 31558 at a glance
| ZIP code | 31558 |
|---|---|
| Primary city | Saint Marys |
| State | Georgia (GA) |
| County | Camden FIPS 13039 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 22,591 |
| Coordinates | 30.801730, -81.516060 |
How ZIP+4 works in 31558
The four digits after the hyphen encode a delivery segment inside 31558. 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 31558 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 31558.
| ZIP | City | Distance |
|---|---|---|
| 31547 | Kings Bay, GA | 1.3 mi |
| 31548 | Kingsland, GA | 11.5 mi |
| 31569 | Woodbine, GA | 12 mi |
| 32034 | Fernandina Beach, FL | 12.3 mi |
| 32097 | Yulee, FL | 12.5 mi |
| 31527 | Jekyll Island, GA | 19.4 mi |
| 31565 | Waverly, GA | 20 mi |
| 31568 | White Oak, GA | 23.1 mi |
| 32226 | Jacksonville, FL | 23.3 mi |
| 32218 | Jacksonville, FL | 23.6 mi |
| 32046 | Hilliard, FL | 24.7 mi |
| 32011 | Callahan, FL | 25 mi |
Questions about 31558
What is the ZIP+4 code for 31558?
31558 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 31558, you need to look up a specific street address to get them.
What city is 31558?
31558 is assigned to Saint Marys, Georgia, in Camden 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.