ZIP Code 17701 — Williamsport, PA
17701 is a standard (street delivery) ZIP code serving Williamsport, Pennsylvania, in Lycoming 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 17701 at a glance
| ZIP code | 17701 |
|---|---|
| Primary city | Williamsport |
| State | Pennsylvania (PA) |
| County | Lycoming FIPS 42081 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 43,104 |
| Coordinates | 41.342060, -76.888210 |
How ZIP+4 works in 17701
The four digits after the hyphen encode a delivery segment inside 17701. 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 17701 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.
Other ZIP codes in Williamsport
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 17701.
| ZIP | City | Distance |
|---|---|---|
| 17754 | Montoursville, PA | 2.1 mi |
| 17728 | Cogan Station, PA | 10.1 mi |
| 17771 | Trout Run, PA | 10.2 mi |
| 17762 | Picture Rocks, PA | 10.2 mi |
| 18619 | Hillsgrove, PA | 10.9 mi |
| 17752 | Montgomery, PA | 11.1 mi |
| 17737 | Hughesville, PA | 11.4 mi |
| 17763 | Ralston, PA | 11.7 mi |
| 17756 | Muncy, PA | 12.2 mi |
| 17702 | Williamsport, PA | 14.8 mi |
| 17744 | Linden, PA | 15.7 mi |
| 17768 | Shunk, PA | 15.9 mi |
Questions about 17701
What is the ZIP+4 code for 17701?
17701 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 17701, you need to look up a specific street address to get them.
What city is 17701?
17701 is assigned to Williamsport, Pennsylvania, in Lycoming 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.