ZIP Code 18628 — Lopez, PA
18628 is a standard (street delivery) ZIP code serving Lopez, Pennsylvania, in Sullivan 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 18628 at a glance
| ZIP code | 18628 |
|---|---|
| Primary city | Lopez |
| State | Pennsylvania (PA) |
| County | Sullivan FIPS 42113 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 185 |
| Coordinates | 41.414740, -76.320470 |
How ZIP+4 works in 18628
The four digits after the hyphen encode a delivery segment inside 18628. 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 18628 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 18628.
| ZIP | City | Distance |
|---|---|---|
| 18632 | Mildred, PA | 4.7 mi |
| 18614 | Dushore, PA | 5.1 mi |
| 18626 | Laporte, PA | 7.4 mi |
| 18656 | Sweet Valley, PA | 8.5 mi |
| 17814 | Benton, PA | 10.5 mi |
| 18636 | Noxen, PA | 12 mi |
| 18629 | Mehoopany, PA | 12.3 mi |
| 17758 | Muncy Valley, PA | 12.7 mi |
| 17731 | Eagles Mere, PA | 13.1 mi |
| 18846 | Sugar Run, PA | 13.8 mi |
| 18833 | New Albany, PA | 14.5 mi |
| 18622 | Huntington Mills, PA | 14.9 mi |
Questions about 18628
What is the ZIP+4 code for 18628?
18628 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 18628, you need to look up a specific street address to get them.
What city is 18628?
18628 is assigned to Lopez, Pennsylvania, in Sullivan 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.