ZIP Code 16634 — Dudley, PA
16634 is a standard (street delivery) ZIP code serving Dudley, Pennsylvania, in Huntingdon 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 16634 at a glance
| ZIP code | 16634 |
|---|---|
| Primary city | Dudley |
| State | Pennsylvania (PA) |
| County | Huntingdon FIPS 42061 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 262 |
| Coordinates | 40.210500, -78.173080 |
How ZIP+4 works in 16634
The four digits after the hyphen encode a delivery segment inside 16634. 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 16634 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 16634.
| ZIP | City | Distance |
|---|---|---|
| 16621 | Broad Top, PA | 2.9 mi |
| 16678 | Saxton, PA | 3.4 mi |
| 16694 | Wood, PA | 3.5 mi |
| 16679 | Six Mile Run, PA | 3.9 mi |
| 16633 | Defiance, PA | 4.7 mi |
| 16672 | Riddlesburg, PA | 4.7 mi |
| 16674 | Robertsdale, PA | 5.2 mi |
| 16685 | Todd, PA | 6.8 mi |
| 16657 | James Creek, PA | 7.9 mi |
| 16689 | Waterfall, PA | 8.1 mi |
| 16623 | Cassville, PA | 8.1 mi |
| 17253 | Saltillo, PA | 8.8 mi |
Questions about 16634
What is the ZIP+4 code for 16634?
16634 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 16634, you need to look up a specific street address to get them.
What city is 16634?
16634 is assigned to Dudley, Pennsylvania, in Huntingdon 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.