ZIP Code 16621 — Broad Top, PA
16621 is a standard (street delivery) ZIP code serving Broad Top, 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 16621 at a glance
| ZIP code | 16621 |
|---|---|
| Primary city | Broad Top |
| State | Pennsylvania (PA) |
| County | Huntingdon FIPS 42061 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 604 |
| Coordinates | 40.228880, -78.122980 |
How ZIP+4 works in 16621
The four digits after the hyphen encode a delivery segment inside 16621. 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 16621 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 16621.
| ZIP | City | Distance |
|---|---|---|
| 16634 | Dudley, PA | 2.9 mi |
| 16674 | Robertsdale, PA | 3.7 mi |
| 16694 | Wood, PA | 3.9 mi |
| 16685 | Todd, PA | 4.2 mi |
| 16623 | Cassville, PA | 5.2 mi |
| 16678 | Saxton, PA | 5.9 mi |
| 16679 | Six Mile Run, PA | 6.3 mi |
| 17253 | Saltillo, PA | 6.3 mi |
| 16657 | James Creek, PA | 7.2 mi |
| 16622 | Calvin, PA | 7.4 mi |
| 16633 | Defiance, PA | 7.5 mi |
| 17264 | Three Springs, PA | 7.6 mi |
Questions about 16621
What is the ZIP+4 code for 16621?
16621 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 16621, you need to look up a specific street address to get them.
What city is 16621?
16621 is assigned to Broad Top, 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.