ZIP Code 18321 — Bartonsville, PA
18321 is a standard (street delivery) ZIP code serving Bartonsville, Pennsylvania, in Monroe 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 18321 at a glance
| ZIP code | 18321 |
|---|---|
| Primary city | Bartonsville |
| State | Pennsylvania (PA) |
| County | Monroe FIPS 42089 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 1,844 |
| Coordinates | 41.017340, -75.287540 |
How ZIP+4 works in 18321
The four digits after the hyphen encode a delivery segment inside 18321. 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 18321 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 18321.
| ZIP | City | Distance |
|---|---|---|
| 18372 | Tannersville, PA | 2.9 mi |
| 18360 | Stroudsburg, PA | 3.1 mi |
| 18355 | Scotrun, PA | 5.2 mi |
| 18332 | Henryville, PA | 5.4 mi |
| 18301 | East Stroudsburg, PA | 5.5 mi |
| 18370 | Swiftwater, PA | 5.6 mi |
| 18354 | Sciota, PA | 6.7 mi |
| 18349 | Pocono Manor, PA | 7.1 mi |
| 18344 | Mount Pocono, PA | 7.5 mi |
| 18327 | Delaware Water Gap, PA | 7.7 mi |
| 18322 | Brodheadsville, PA | 8.7 mi |
| 18334 | Long Pond, PA | 8.9 mi |
Questions about 18321
What is the ZIP+4 code for 18321?
18321 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 18321, you need to look up a specific street address to get them.
What city is 18321?
18321 is assigned to Bartonsville, Pennsylvania, in Monroe 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.