ZIP Code 15851 — Reynoldsville, PA
15851 is a standard (street delivery) ZIP code serving Reynoldsville, 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 15851 at a glance
| ZIP code | 15851 |
|---|---|
| Primary city | Reynoldsville |
| State | Pennsylvania (PA) |
| County | Jefferson FIPS 42065 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 7,059 |
| Coordinates | 41.101150, -78.903160 |
How ZIP+4 works in 15851
The four digits after the hyphen encode a delivery segment inside 15851. 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 15851 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 15851.
| ZIP | City | Distance |
|---|---|---|
| 15865 | Sykesville, PA | 5.8 mi |
| 15840 | Falls Creek, PA | 6.1 mi |
| 15847 | Knox Dale, PA | 6.6 mi |
| 15863 | Stump Creek, PA | 6.8 mi |
| 15711 | Anita, PA | 7 mi |
| 15866 | Troutville, PA | 8 mi |
| 15733 | De Lancey, PA | 8.4 mi |
| 15825 | Brookville, PA | 8.5 mi |
| 15715 | Big Run, PA | 9.1 mi |
| 15801 | Du Bois, PA | 9.5 mi |
| 15764 | Oliveburg, PA | 9.8 mi |
| 15781 | Walston, PA | 10.4 mi |
Questions about 15851
What is the ZIP+4 code for 15851?
15851 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 15851, you need to look up a specific street address to get them.
What city is 15851?
15851 is assigned to Reynoldsville, 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.