ZIP Code 17721 — Avis, PA
17721 is a standard (street delivery) ZIP code serving Avis, Pennsylvania, in Clinton 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 17721 at a glance
| ZIP code | 17721 |
|---|---|
| Primary city | Avis |
| State | Pennsylvania (PA) |
| County | Clinton FIPS 42035 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 1,419 |
| Coordinates | 41.181550, -77.319270 |
How ZIP+4 works in 17721
The four digits after the hyphen encode a delivery segment inside 17721. 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 17721 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 17721.
| ZIP | City | Distance |
|---|---|---|
| 17748 | Mcelhattan, PA | 2.6 mi |
| 17779 | Woolrich, PA | 3.6 mi |
| 17740 | Jersey Shore, PA | 4.7 mi |
| 17720 | Antes Fort, PA | 5.9 mi |
| 17744 | Linden, PA | 9.3 mi |
| 17747 | Loganton, PA | 9.9 mi |
| 17745 | Lock Haven, PA | 11.1 mi |
| 17751 | Mill Hall, PA | 11.6 mi |
| 17750 | Mackeyville, PA | 12 mi |
| 17702 | Williamsport, PA | 12.6 mi |
| 16872 | Rebersburg, PA | 14.9 mi |
| 17728 | Cogan Station, PA | 15.8 mi |
Questions about 17721
What is the ZIP+4 code for 17721?
17721 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 17721, you need to look up a specific street address to get them.
What city is 17721?
17721 is assigned to Avis, Pennsylvania, in Clinton 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.