ZIP Code 18091 — Wind Gap, PA
18091 is a standard (street delivery) ZIP code serving Wind Gap, Pennsylvania, in Northampton 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 18091 at a glance
| ZIP code | 18091 |
|---|---|
| Primary city | Wind Gap |
| State | Pennsylvania (PA) |
| County | Northampton FIPS 42095 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 6,547 |
| Coordinates | 40.826560, -75.320680 |
How ZIP+4 works in 18091
The four digits after the hyphen encode a delivery segment inside 18091. 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 18091 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 18091.
| ZIP | City | Distance |
|---|---|---|
| 18072 | Pen Argyl, PA | 3.5 mi |
| 18064 | Nazareth, PA | 4.8 mi |
| 18353 | Saylorsburg, PA | 5.6 mi |
| 18083 | Stockertown, PA | 5.8 mi |
| 18014 | Bath, PA | 6.3 mi |
| 18354 | Sciota, PA | 6.8 mi |
| 18085 | Tatamy, PA | 6.8 mi |
| 18040 | Easton, PA | 7.6 mi |
| 18322 | Brodheadsville, PA | 7.7 mi |
| 18063 | Martins Creek, PA | 7.9 mi |
| 18013 | Bangor, PA | 8.1 mi |
| 18331 | Gilbert, PA | 8.5 mi |
Questions about 18091
What is the ZIP+4 code for 18091?
18091 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 18091, you need to look up a specific street address to get them.
What city is 18091?
18091 is assigned to Wind Gap, Pennsylvania, in Northampton 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.