ZIP Code 17745 — Lock Haven, PA
17745 is a standard (street delivery) ZIP code serving Lock Haven, 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 17745 at a glance
| ZIP code | 17745 |
|---|---|
| Primary city | Lock Haven |
| State | Pennsylvania (PA) |
| County | Clinton FIPS 42035 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 17,718 |
| Coordinates | 41.285890, -77.480970 |
How ZIP+4 works in 17745
The four digits after the hyphen encode a delivery segment inside 17745. 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 17745 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 17745.
| ZIP | City | Distance |
|---|---|---|
| 17779 | Woolrich, PA | 7.6 mi |
| 17739 | Jersey Mills, PA | 9.7 mi |
| 17723 | Cammal, PA | 10.1 mi |
| 17751 | Mill Hall, PA | 11 mi |
| 17721 | Avis, PA | 11.1 mi |
| 17748 | Mcelhattan, PA | 11.5 mi |
| 17740 | Jersey Shore, PA | 11.9 mi |
| 17760 | North Bend, PA | 12.3 mi |
| 17776 | Waterville, PA | 12.6 mi |
| 17769 | Slate Run, PA | 14.8 mi |
| 16822 | Beech Creek, PA | 15 mi |
| 17750 | Mackeyville, PA | 15.9 mi |
Questions about 17745
What is the ZIP+4 code for 17745?
17745 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 17745, you need to look up a specific street address to get them.
What city is 17745?
17745 is assigned to Lock Haven, 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.