ZIP Code 18657 — Tunkhannock, PA
18657 is a standard (street delivery) ZIP code serving Tunkhannock, Pennsylvania, in Wyoming 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 18657 at a glance
| ZIP code | 18657 |
|---|---|
| Primary city | Tunkhannock |
| State | Pennsylvania (PA) |
| County | Wyoming FIPS 42131 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 10,866 |
| Coordinates | 41.527120, -75.956010 |
How ZIP+4 works in 18657
The four digits after the hyphen encode a delivery segment inside 18657. 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 18657 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 18657.
| ZIP | City | Distance |
|---|---|---|
| 18625 | Lake Winola, PA | 5.5 mi |
| 18615 | Falls, PA | 6.9 mi |
| 18419 | Factoryville, PA | 8.8 mi |
| 18629 | Mehoopany, PA | 9.2 mi |
| 18630 | Meshoppen, PA | 10.1 mi |
| 18440 | La Plume, PA | 10.1 mi |
| 18636 | Noxen, PA | 10.5 mi |
| 18618 | Harveys Lake, PA | 10.9 mi |
| 18414 | Dalton, PA | 11 mi |
| 18844 | Springville, PA | 11.6 mi |
| 18411 | Clarks Summit, PA | 12 mi |
| 18612 | Dallas, PA | 12.3 mi |
Questions about 18657
What is the ZIP+4 code for 18657?
18657 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 18657, you need to look up a specific street address to get them.
What city is 18657?
18657 is assigned to Tunkhannock, Pennsylvania, in Wyoming 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.