ZIP Code 15635 — Hannastown, PA
15635 is a standard (street delivery) ZIP code serving Hannastown, Pennsylvania, in Westmoreland 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 15635 at a glance
| ZIP code | 15635 |
|---|---|
| Primary city | Hannastown |
| State | Pennsylvania (PA) |
| County | Westmoreland FIPS 42129 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 228 |
| Coordinates | 40.348910, -79.498770 |
How ZIP+4 works in 15635
The four digits after the hyphen encode a delivery segment inside 15635. 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 15635 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 15635.
| ZIP | City | Distance |
|---|---|---|
| 15662 | Luxor, PA | 1.2 mi |
| 15633 | Forbes Road, PA | 1.2 mi |
| 15624 | Crabtree, PA | 1.9 mi |
| 15619 | Bovard, PA | 2 mi |
| 15601 | Greensburg, PA | 3.1 mi |
| 15670 | New Alexandria, PA | 5.4 mi |
| 15626 | Delmont, PA | 5.8 mi |
| 15634 | Grapeville, PA | 5.9 mi |
| 15644 | Jeannette, PA | 6 mi |
| 15623 | Claridge, PA | 6.7 mi |
| 15675 | Penn, PA | 7.4 mi |
| 15661 | Loyalhanna, PA | 7.5 mi |
Questions about 15635
What is the ZIP+4 code for 15635?
15635 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 15635, you need to look up a specific street address to get them.
What city is 15635?
15635 is assigned to Hannastown, Pennsylvania, in Westmoreland 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.