ZIP Code 16050 — Petrolia, PA
16050 is a standard (street delivery) ZIP code serving Petrolia, 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 16050 at a glance
| ZIP code | 16050 |
|---|---|
| Primary city | Petrolia |
| State | Pennsylvania (PA) |
| County | Butler FIPS 42019 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 1,097 |
| Coordinates | 41.043620, -79.773790 |
How ZIP+4 works in 16050
The four digits after the hyphen encode a delivery segment inside 16050. 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 16050 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 16050.
| ZIP | City | Distance |
|---|---|---|
| 16048 | North Washington, PA | 1.7 mi |
| 16022 | Bruin, PA | 2.2 mi |
| 16041 | Karns City, PA | 4 mi |
| 16040 | Hilliards, PA | 5.1 mi |
| 16049 | Parker, PA | 6.4 mi |
| 16061 | West Sunbury, PA | 6.4 mi |
| 16030 | Eau Claire, PA | 6.5 mi |
| 16025 | Chicora, PA | 6.9 mi |
| 16020 | Boyers, PA | 8.1 mi |
| 16036 | Foxburg, PA | 8.3 mi |
| 16028 | East Brady, PA | 9.2 mi |
| 16054 | Saint Petersburg, PA | 9.9 mi |
Questions about 16050
What is the ZIP+4 code for 16050?
16050 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 16050, you need to look up a specific street address to get them.
What city is 16050?
16050 is assigned to Petrolia, 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.