ZIP Code 15923 — Bolivar, PA
15923 is a standard (street delivery) ZIP code serving Bolivar, 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 15923 at a glance
| ZIP code | 15923 |
|---|---|
| Primary city | Bolivar |
| State | Pennsylvania (PA) |
| County | Westmoreland FIPS 42129 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 1,585 |
| Coordinates | 40.355180, -79.164470 |
How ZIP+4 works in 15923
The four digits after the hyphen encode a delivery segment inside 15923. 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 15923 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 15923.
| ZIP | City | Distance |
|---|---|---|
| 15949 | Robinson, PA | 3.8 mi |
| 15779 | Torrance, PA | 4.2 mi |
| 15944 | New Florence, PA | 4.4 mi |
| 15627 | Derry, PA | 7.5 mi |
| 15658 | Ligonier, PA | 7.6 mi |
| 15717 | Blairsville, PA | 7.8 mi |
| 15716 | Black Lick, PA | 8.1 mi |
| 15671 | New Derry, PA | 8.3 mi |
| 15750 | Josephine, PA | 8.9 mi |
| 15620 | Bradenville, PA | 9.4 mi |
| 15954 | Seward, PA | 9.7 mi |
| 15920 | Armagh, PA | 9.8 mi |
Questions about 15923
What is the ZIP+4 code for 15923?
15923 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 15923, you need to look up a specific street address to get them.
What city is 15923?
15923 is assigned to Bolivar, 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.