ZIP Code 08865 — Phillipsburg, NJ
08865 is a standard (street delivery) ZIP code serving Phillipsburg, New Jersey, in Warren 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 08865 at a glance
| ZIP code | 08865 |
|---|---|
| Primary city | Phillipsburg |
| State | New Jersey (NJ) |
| County | Warren FIPS 34041 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 31,427 |
| Coordinates | 40.709400, -75.151090 |
How ZIP+4 works in 08865
The four digits after the hyphen encode a delivery segment inside 08865. 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 08865 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 08865.
| ZIP | City | Distance |
|---|---|---|
| 08886 | Stewartsville, NJ | 2.6 mi |
| 18040 | Easton, PA | 4.5 mi |
| 08804 | Bloomsbury, NJ | 5.3 mi |
| 18063 | Martins Creek, PA | 5.3 mi |
| 18042 | Easton, PA | 5.6 mi |
| 18085 | Tatamy, PA | 5.8 mi |
| 18045 | Easton, PA | 6.6 mi |
| 18083 | Stockertown, PA | 6.7 mi |
| 08802 | Asbury, NJ | 6.9 mi |
| 07882 | Washington, NJ | 8.1 mi |
| 08848 | Milford, NJ | 8.5 mi |
| 18064 | Nazareth, PA | 9.4 mi |
Questions about 08865
What is the ZIP+4 code for 08865?
08865 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 08865, you need to look up a specific street address to get them.
What city is 08865?
08865 is assigned to Phillipsburg, New Jersey, in Warren 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.