ZIP Code 16157 — Wampum, PA
16157 is a standard (street delivery) ZIP code serving Wampum, Pennsylvania, in Lawrence 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 16157 at a glance
| ZIP code | 16157 |
|---|---|
| Primary city | Wampum |
| State | Pennsylvania (PA) |
| County | Lawrence FIPS 42073 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 2,840 |
| Coordinates | 40.889020, -80.335090 |
How ZIP+4 works in 16157
The four digits after the hyphen encode a delivery segment inside 16157. 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 16157 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 16157.
| ZIP | City | Distance |
|---|---|---|
| 16160 | West Pittsburg, PA | 3.1 mi |
| 16141 | New Galilee, PA | 3.4 mi |
| 16136 | Koppel, PA | 3.8 mi |
| 16117 | Ellwood City, PA | 4.2 mi |
| 16102 | New Castle, PA | 6.6 mi |
| 16120 | Enon Valley, PA | 7.2 mi |
| 16101 | New Castle, PA | 7.2 mi |
| 15010 | Beaver Falls, PA | 8.4 mi |
| 16123 | Fombell, PA | 8.4 mi |
| 16115 | Darlington, PA | 9.3 mi |
| 16112 | Bessemer, PA | 10.2 mi |
| 15066 | New Brighton, PA | 10.4 mi |
Questions about 16157
What is the ZIP+4 code for 16157?
16157 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 16157, you need to look up a specific street address to get them.
What city is 16157?
16157 is assigned to Wampum, Pennsylvania, in Lawrence 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.