ZIP Code 18831 — Milan, PA
18831 is a standard (street delivery) ZIP code serving Milan, Pennsylvania, in Bradford 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 18831 at a glance
| ZIP code | 18831 |
|---|---|
| Primary city | Milan |
| State | Pennsylvania (PA) |
| County | Bradford FIPS 42015 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 1,081 |
| Coordinates | 41.893560, -76.608320 |
How ZIP+4 works in 18831
The four digits after the hyphen encode a delivery segment inside 18831. 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 18831 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 18831.
| ZIP | City | Distance |
|---|---|---|
| 18817 | East Smithfield, PA | 1.5 mi |
| 18810 | Athens, PA | 6.3 mi |
| 18850 | Ulster, PA | 6.5 mi |
| 18840 | Sayre, PA | 6.9 mi |
| 18814 | Burlington, PA | 7.7 mi |
| 16914 | Columbia Cross Roads, PA | 8.9 mi |
| 16925 | Gillett, PA | 10.2 mi |
| 14825 | Chemung, NY | 11.2 mi |
| 14892 | Waverly, NY | 11.4 mi |
| 14894 | Wellsburg, NY | 12.3 mi |
| 18848 | Towanda, PA | 12.4 mi |
| 16947 | Troy, PA | 12.9 mi |
Questions about 18831
What is the ZIP+4 code for 18831?
18831 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 18831, you need to look up a specific street address to get them.
What city is 18831?
18831 is assigned to Milan, Pennsylvania, in Bradford 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.