ZIP Code 18343 — Mount Bethel, PA
18343 is a standard (street delivery) ZIP code serving Mount Bethel, 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 18343 at a glance
| ZIP code | 18343 |
|---|---|
| Primary city | Mount Bethel |
| State | Pennsylvania (PA) |
| County | Northampton FIPS 42095 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 3,637 |
| Coordinates | 40.890430, -75.105800 |
How ZIP+4 works in 18343
The four digits after the hyphen encode a delivery segment inside 18343. 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 18343 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 18343.
| ZIP | City | Distance |
|---|---|---|
| 07833 | Delaware, NJ | 1.9 mi |
| 18351 | Portland, PA | 2.3 mi |
| 18013 | Bangor, PA | 4.2 mi |
| 07832 | Columbia, NJ | 4.5 mi |
| 07823 | Belvidere, NJ | 5.7 mi |
| 18327 | Delaware Water Gap, PA | 6.8 mi |
| 07844 | Hope, NJ | 7.2 mi |
| 18063 | Martins Creek, PA | 8.4 mi |
| 18072 | Pen Argyl, PA | 8.5 mi |
| 18356 | Shawnee On Delaware, PA | 8.7 mi |
| 07863 | Oxford, NJ | 9 mi |
| 07825 | Blairstown, NJ | 9.8 mi |
Questions about 18343
What is the ZIP+4 code for 18343?
18343 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 18343, you need to look up a specific street address to get them.
What city is 18343?
18343 is assigned to Mount Bethel, 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.