ZIP Code 17856 — New Columbia, PA
17856 is a standard (street delivery) ZIP code serving New Columbia, Pennsylvania, in Union 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 17856 at a glance
| ZIP code | 17856 |
|---|---|
| Primary city | New Columbia |
| State | Pennsylvania (PA) |
| County | Union FIPS 42119 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 3,167 |
| Coordinates | 41.056360, -76.972200 |
How ZIP+4 works in 17856
The four digits after the hyphen encode a delivery segment inside 17856. 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 17856 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 17856.
| ZIP | City | Distance |
|---|---|---|
| 17887 | White Deer, PA | 4.7 mi |
| 17810 | Allenwood, PA | 4.8 mi |
| 17886 | West Milton, PA | 5.6 mi |
| 17837 | Lewisburg, PA | 5.8 mi |
| 17730 | Dewart, PA | 6.1 mi |
| 17777 | Watsontown, PA | 8.2 mi |
| 17749 | Mcewensville, PA | 8.3 mi |
| 17850 | Montandon, PA | 8.5 mi |
| 17844 | Mifflinburg, PA | 9 mi |
| 17752 | Montgomery, PA | 9.1 mi |
| 17847 | Milton, PA | 9.3 mi |
| 17702 | Williamsport, PA | 10.3 mi |
Questions about 17856
What is the ZIP+4 code for 17856?
17856 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 17856, you need to look up a specific street address to get them.
What city is 17856?
17856 is assigned to New Columbia, Pennsylvania, in Union 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.