ZIP Code 18503 — Scranton, PA
18503 is a standard (street delivery) ZIP code serving Scranton, Pennsylvania, in Lackawanna 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 18503 at a glance
| ZIP code | 18503 |
|---|---|
| Primary city | Scranton |
| State | Pennsylvania (PA) |
| County | Lackawanna FIPS 42069 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 1,629 |
| Coordinates | 41.410070, -75.667670 |
How ZIP+4 works in 18503
The four digits after the hyphen encode a delivery segment inside 18503. 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 18503 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.
Other ZIP codes in Scranton
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 18503.
| ZIP | City | Distance |
|---|---|---|
| 18510 | Scranton, PA | 1.3 mi |
| 18505 | Scranton, PA | 1.7 mi |
| 18509 | Scranton, PA | 1.9 mi |
| 18504 | Scranton, PA | 2.2 mi |
| 18517 | Taylor, PA | 2.6 mi |
| 18508 | Scranton, PA | 3.1 mi |
| 18507 | Moosic, PA | 3.8 mi |
| 18512 | Scranton, PA | 4.1 mi |
| 18519 | Scranton, PA | 4.1 mi |
| 18518 | Old Forge, PA | 4.4 mi |
| 18411 | Clarks Summit, PA | 5 mi |
| 18641 | Pittston, PA | 6 mi |
Questions about 18503
What is the ZIP+4 code for 18503?
18503 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 18503, you need to look up a specific street address to get them.
What city is 18503?
18503 is assigned to Scranton, Pennsylvania, in Lackawanna 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.