ZIP Code 16056 — Saxonburg, PA
16056 is a standard (street delivery) ZIP code serving Saxonburg, Pennsylvania, in Butler 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 16056 at a glance
| ZIP code | 16056 |
|---|---|
| Primary city | Saxonburg |
| State | Pennsylvania (PA) |
| County | Butler FIPS 42019 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 4,232 |
| Coordinates | 40.723010, -79.839110 |
How ZIP+4 works in 16056
The four digits after the hyphen encode a delivery segment inside 16056. 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 16056 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 16056.
| ZIP | City | Distance |
|---|---|---|
| 16059 | Valencia, PA | 4.8 mi |
| 16055 | Sarver, PA | 4.8 mi |
| 16023 | Cabot, PA | 6.4 mi |
| 16002 | Butler, PA | 6.5 mi |
| 15006 | Bairdford, PA | 6.5 mi |
| 15084 | Tarentum, PA | 6.8 mi |
| 15007 | Bakerstown, PA | 6.9 mi |
| 15076 | Russellton, PA | 7.8 mi |
| 15044 | Gibsonia, PA | 8.1 mi |
| 15065 | Natrona Heights, PA | 8.1 mi |
| 15014 | Brackenridge, PA | 9.4 mi |
| 15075 | Rural Ridge, PA | 9.4 mi |
Questions about 16056
What is the ZIP+4 code for 16056?
16056 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 16056, you need to look up a specific street address to get them.
What city is 16056?
16056 is assigned to Saxonburg, Pennsylvania, in Butler 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.