ZIP Code 15857 — Saint Marys, PA
15857 is a standard (street delivery) ZIP code serving Saint Marys, Pennsylvania, in Elk 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 15857 at a glance
| ZIP code | 15857 |
|---|---|
| Primary city | Saint Marys |
| State | Pennsylvania (PA) |
| County | Elk FIPS 42047 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 12,736 |
| Coordinates | 41.456710, -78.534390 |
How ZIP+4 works in 15857
The four digits after the hyphen encode a delivery segment inside 15857. 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 15857 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 15857.
| ZIP | City | Distance |
|---|---|---|
| 15831 | Dagus Mines, PA | 8 mi |
| 15845 | Johnsonburg, PA | 8.8 mi |
| 15870 | Wilcox, PA | 8.9 mi |
| 15846 | Kersey, PA | 9.4 mi |
| 15821 | Benezett, PA | 11.1 mi |
| 15827 | Byrnedale, PA | 11.3 mi |
| 15868 | Weedville, PA | 12.4 mi |
| 15841 | Force, PA | 13.8 mi |
| 15834 | Emporium, PA | 13.8 mi |
| 15853 | Ridgway, PA | 14.1 mi |
| 16740 | Mount Jewett, PA | 16.3 mi |
| 15823 | Brockport, PA | 16.4 mi |
Questions about 15857
What is the ZIP+4 code for 15857?
15857 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 15857, you need to look up a specific street address to get them.
What city is 15857?
15857 is assigned to Saint Marys, Pennsylvania, in Elk 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.