ZIP Code 18451 — Paupack, PA
18451 is a standard (street delivery) ZIP code serving Paupack, Pennsylvania, in Pike 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 18451 at a glance
| ZIP code | 18451 |
|---|---|
| Primary city | Paupack |
| State | Pennsylvania (PA) |
| County | Pike FIPS 42103 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 413 |
| Coordinates | 41.398490, -75.220230 |
How ZIP+4 works in 18451
The four digits after the hyphen encode a delivery segment inside 18451. 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 18451 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 18451.
| ZIP | City | Distance |
|---|---|---|
| 18464 | Tafton, PA | 2.2 mi |
| 18438 | Lakeville, PA | 2.9 mi |
| 18426 | Greentown, PA | 4.9 mi |
| 18428 | Hawley, PA | 5.4 mi |
| 18463 | Sterling, PA | 8.9 mi |
| 18473 | White Mills, PA | 9 mi |
| 18436 | Lake Ariel, PA | 9.5 mi |
| 18445 | Newfoundland, PA | 9.7 mi |
| 18457 | Rowland, PA | 10 mi |
| 18425 | Greeley, PA | 10.4 mi |
| 18460 | South Sterling, PA | 11.2 mi |
| 18357 | Skytop, PA | 11.7 mi |
Questions about 18451
What is the ZIP+4 code for 18451?
18451 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 18451, you need to look up a specific street address to get them.
What city is 18451?
18451 is assigned to Paupack, Pennsylvania, in Pike 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.