ZIP Code 15864 — Summerville, PA
15864 is a standard (street delivery) ZIP code serving Summerville, Pennsylvania, in Jefferson 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 15864 at a glance
| ZIP code | 15864 |
|---|---|
| Primary city | Summerville |
| State | Pennsylvania (PA) |
| County | Jefferson FIPS 42065 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 1,789 |
| Coordinates | 41.099110, -79.195320 |
How ZIP+4 works in 15864
The four digits after the hyphen encode a delivery segment inside 15864. 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 15864 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 15864.
| ZIP | City | Distance |
|---|---|---|
| 16240 | Mayport, PA | 4.8 mi |
| 15829 | Corsica, PA | 5.1 mi |
| 16224 | Fairmount City, PA | 5.6 mi |
| 15784 | Worthville, PA | 5.9 mi |
| 16230 | Hawthorn, PA | 6.9 mi |
| 15776 | Sprankle Mills, PA | 7.3 mi |
| 15770 | Ringgold, PA | 7.4 mi |
| 15730 | Coolspring, PA | 7.8 mi |
| 16245 | Oak Ridge, PA | 8.4 mi |
| 15847 | Knox Dale, PA | 8.7 mi |
| 15778 | Timblin, PA | 9.1 mi |
| 15825 | Brookville, PA | 9.5 mi |
Questions about 15864
What is the ZIP+4 code for 15864?
15864 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 15864, you need to look up a specific street address to get them.
What city is 15864?
15864 is assigned to Summerville, Pennsylvania, in Jefferson 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.