ZIP Code 17778 — Westport, PA
17778 is a standard (street delivery) ZIP code serving Westport, Pennsylvania, in Clinton 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 17778 at a glance
| ZIP code | 17778 |
|---|---|
| Primary city | Westport |
| State | Pennsylvania (PA) |
| County | Clinton FIPS 42035 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 74 |
| Coordinates | 41.285320, -77.964770 |
How ZIP+4 works in 17778
The four digits after the hyphen encode a delivery segment inside 17778. 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 17778 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 17778.
| ZIP | City | Distance |
|---|---|---|
| 15861 | Sinnamahoning, PA | 6.1 mi |
| 16871 | Pottersdale, PA | 7.7 mi |
| 17764 | Renovo, PA | 8.2 mi |
| 16845 | Karthaus, PA | 9.4 mi |
| 16864 | Orviston, PA | 12.5 mi |
| 15832 | Driftwood, PA | 12.6 mi |
| 16829 | Clarence, PA | 14.5 mi |
| 16822 | Beech Creek, PA | 15.7 mi |
| 16859 | Moshannon, PA | 16.7 mi |
| 17760 | North Bend, PA | 17.3 mi |
| 16836 | Frenchville, PA | 18.3 mi |
| 16834 | Drifting, PA | 18.5 mi |
Questions about 17778
What is the ZIP+4 code for 17778?
17778 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 17778, you need to look up a specific street address to get them.
What city is 17778?
17778 is assigned to Westport, Pennsylvania, in Clinton 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.