ZIP Code 08559 — Stockton, NJ
08559 is a standard (street delivery) ZIP code serving Stockton, New Jersey, in Hunterdon 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 08559 at a glance
| ZIP code | 08559 |
|---|---|
| Primary city | Stockton |
| State | New Jersey (NJ) |
| County | Hunterdon FIPS 34019 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 4,836 |
| Coordinates | 40.438700, -74.971600 |
How ZIP+4 works in 08559
The four digits after the hyphen encode a delivery segment inside 08559. 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 08559 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 08559.
| ZIP | City | Distance |
|---|---|---|
| 18933 | Lumberville, PA | 4.5 mi |
| 18950 | Point Pleasant, PA | 5 mi |
| 08825 | Frenchtown, NJ | 5.8 mi |
| 08530 | Lambertville, NJ | 6 mi |
| 18913 | Carversville, PA | 6.1 mi |
| 18938 | New Hope, PA | 6.2 mi |
| 08551 | Ringoes, NJ | 7 mi |
| 18920 | Erwinna, PA | 7.3 mi |
| 18947 | Pipersville, PA | 7.5 mi |
| 08822 | Flemington, NJ | 8 mi |
| 18902 | Doylestown, PA | 8.8 mi |
| 18912 | Buckingham, PA | 9.3 mi |
Questions about 08559
What is the ZIP+4 code for 08559?
08559 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 08559, you need to look up a specific street address to get them.
What city is 08559?
08559 is assigned to Stockton, New Jersey, in Hunterdon 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.