ZIP Code 16743 — Port Allegany, PA
16743 is a standard (street delivery) ZIP code serving Port Allegany, Pennsylvania, in McKean 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 16743 at a glance
| ZIP code | 16743 |
|---|---|
| Primary city | Port Allegany |
| State | Pennsylvania (PA) |
| County | McKean FIPS 42083 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 4,061 |
| Coordinates | 41.788800, -78.260160 |
How ZIP+4 works in 16743
The four digits after the hyphen encode a delivery segment inside 16743. 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 16743 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 16743.
| ZIP | City | Distance |
|---|---|---|
| 16746 | Roulette, PA | 6.3 mi |
| 16750 | Turtlepoint, PA | 7.1 mi |
| 16724 | Crosby, PA | 7.3 mi |
| 16749 | Smethport, PA | 8.6 mi |
| 16730 | East Smethport, PA | 8.6 mi |
| 16748 | Shinglehouse, PA | 12.2 mi |
| 16731 | Eldred, PA | 12.3 mi |
| 16745 | Rixford, PA | 15.2 mi |
| 16915 | Coudersport, PA | 15.4 mi |
| 14721 | Ceres, NY | 15.7 mi |
| 16740 | Mount Jewett, PA | 16.3 mi |
| 16726 | Cyclone, PA | 16.4 mi |
Questions about 16743
What is the ZIP+4 code for 16743?
16743 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 16743, you need to look up a specific street address to get them.
What city is 16743?
16743 is assigned to Port Allegany, Pennsylvania, in McKean 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.