ZIP Code 17065 — Mount Holly Springs, PA
17065 is a standard (street delivery) ZIP code serving Mount Holly Springs, Pennsylvania, in Cumberland 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 17065 at a glance
| ZIP code | 17065 |
|---|---|
| Primary city | Mount Holly Springs |
| State | Pennsylvania (PA) |
| County | Cumberland FIPS 42041 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 4,389 |
| Coordinates | 40.098370, -77.205270 |
How ZIP+4 works in 17065
The four digits after the hyphen encode a delivery segment inside 17065. 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 17065 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 17065.
| ZIP | City | Distance |
|---|---|---|
| 17324 | Gardners, PA | 4.5 mi |
| 17007 | Boiling Springs, PA | 5.2 mi |
| 17015 | Carlisle, PA | 6.1 mi |
| 17081 | Plainfield, PA | 8.2 mi |
| 17306 | Bendersville, PA | 8.2 mi |
| 17372 | York Springs, PA | 8.5 mi |
| 17304 | Aspers, PA | 8.5 mi |
| 17019 | Dillsburg, PA | 9.5 mi |
| 17323 | Franklintown, PA | 9.6 mi |
| 17013 | Carlisle, PA | 9.9 mi |
| 17266 | Walnut Bottom, PA | 10.9 mi |
| 17307 | Biglerville, PA | 11.8 mi |
Questions about 17065
What is the ZIP+4 code for 17065?
17065 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 17065, you need to look up a specific street address to get them.
What city is 17065?
17065 is assigned to Mount Holly Springs, Pennsylvania, in Cumberland 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.