ZIP Code 18660 — Wapwallopen, PA
18660 is a standard (street delivery) ZIP code serving Wapwallopen, Pennsylvania, in Luzerne 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 18660 at a glance
| ZIP code | 18660 |
|---|---|
| Primary city | Wapwallopen |
| State | Pennsylvania (PA) |
| County | Luzerne FIPS 42079 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 3,137 |
| Coordinates | 41.101950, -76.061960 |
How ZIP+4 works in 18660
The four digits after the hyphen encode a delivery segment inside 18660. 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 18660 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 18660.
| ZIP | City | Distance |
|---|---|---|
| 18617 | Glen Lyon, PA | 4.9 mi |
| 18222 | Drums, PA | 5.6 mi |
| 18634 | Nanticoke, PA | 6.4 mi |
| 18707 | Mountain Top, PA | 7.6 mi |
| 18219 | Conyngham, PA | 7.7 mi |
| 18249 | Sugarloaf, PA | 8.7 mi |
| 18239 | Milnesville, PA | 8.8 mi |
| 18635 | Nescopeck, PA | 9 mi |
| 18655 | Shickshinny, PA | 9 mi |
| 18234 | Lattimer Mines, PA | 9.1 mi |
| 18225 | Harleigh, PA | 9.6 mi |
| 18603 | Berwick, PA | 9.6 mi |
Questions about 18660
What is the ZIP+4 code for 18660?
18660 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 18660, you need to look up a specific street address to get them.
What city is 18660?
18660 is assigned to Wapwallopen, Pennsylvania, in Luzerne 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.