ZIP Code 16346 — Seneca, PA
16346 is a standard (street delivery) ZIP code serving Seneca, Pennsylvania, in Venango 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 16346 at a glance
| ZIP code | 16346 |
|---|---|
| Primary city | Seneca |
| State | Pennsylvania (PA) |
| County | Venango FIPS 42121 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 3,201 |
| Coordinates | 41.378450, -79.672700 |
How ZIP+4 works in 16346
The four digits after the hyphen encode a delivery segment inside 16346. 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 16346 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 16346.
| ZIP | City | Distance |
|---|---|---|
| 16319 | Cranberry, PA | 4.5 mi |
| 16343 | Reno, PA | 5.1 mi |
| 16301 | Oil City, PA | 5.5 mi |
| 16344 | Rouseville, PA | 6.4 mi |
| 16364 | Venus, PA | 8.2 mi |
| 16331 | Kossuth, PA | 8.3 mi |
| 16323 | Franklin, PA | 8.5 mi |
| 16374 | Kennerdell, PA | 10.8 mi |
| 16373 | Emlenton, PA | 11.8 mi |
| 16232 | Knox, PA | 12.5 mi |
| 16326 | Fryburg, PA | 12.5 mi |
| 16334 | Marble, PA | 12.8 mi |
Questions about 16346
What is the ZIP+4 code for 16346?
16346 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 16346, you need to look up a specific street address to get them.
What city is 16346?
16346 is assigned to Seneca, Pennsylvania, in Venango 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.