ZIP Code 15856 — Rockton, PA
15856 is a standard (street delivery) ZIP code serving Rockton, Pennsylvania, in Clearfield 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 15856 at a glance
| ZIP code | 15856 |
|---|---|
| Primary city | Rockton |
| State | Pennsylvania (PA) |
| County | Clearfield FIPS 42033 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 776 |
| Coordinates | 41.089060, -78.615400 |
How ZIP+4 works in 15856
The four digits after the hyphen encode a delivery segment inside 15856. 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 15856 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 15856.
| ZIP | City | Distance |
|---|---|---|
| 15801 | Du Bois, PA | 6.3 mi |
| 15848 | Luthersburg, PA | 6.7 mi |
| 15849 | Penfield, PA | 6.9 mi |
| 16838 | Grampian, PA | 7 mi |
| 16830 | Clearfield, PA | 9.5 mi |
| 16843 | Hyde, PA | 9.7 mi |
| 15866 | Troutville, PA | 9.9 mi |
| 16833 | Curwensville, PA | 10.4 mi |
| 15865 | Sykesville, PA | 10.7 mi |
| 15840 | Falls Creek, PA | 12.3 mi |
| 16837 | Glen Richey, PA | 12.3 mi |
| 15863 | Stump Creek, PA | 12.7 mi |
Questions about 15856
What is the ZIP+4 code for 15856?
15856 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 15856, you need to look up a specific street address to get them.
What city is 15856?
15856 is assigned to Rockton, Pennsylvania, in Clearfield 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.