ZIP Code 16666 — Osceola Mills, PA
16666 is a standard (street delivery) ZIP code serving Osceola Mills, 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 16666 at a glance
| ZIP code | 16666 |
|---|---|
| Primary city | Osceola Mills |
| State | Pennsylvania (PA) |
| County | Clearfield FIPS 42033 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 2,999 |
| Coordinates | 40.870560, -78.312860 |
How ZIP+4 works in 16666
The four digits after the hyphen encode a delivery segment inside 16666. 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 16666 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 16666.
| ZIP | City | Distance |
|---|---|---|
| 16620 | Brisbin, PA | 3 mi |
| 16651 | Houtzdale, PA | 3.7 mi |
| 16878 | West Decatur, PA | 5.2 mi |
| 16677 | Sandy Ridge, PA | 5.2 mi |
| 16876 | Wallaceton, PA | 6.7 mi |
| 16840 | Hawk Run, PA | 6.9 mi |
| 16671 | Ramey, PA | 7 mi |
| 16866 | Philipsburg, PA | 7.4 mi |
| 16661 | Madera, PA | 7.7 mi |
| 16825 | Bigler, PA | 8.1 mi |
| 16821 | Allport, PA | 8.5 mi |
| 16863 | Olanta, PA | 8.8 mi |
Questions about 16666
What is the ZIP+4 code for 16666?
16666 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 16666, you need to look up a specific street address to get them.
What city is 16666?
16666 is assigned to Osceola Mills, 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.