ZIP Code 08812 — Dunellen, NJ
08812 is a standard (street delivery) ZIP code serving Dunellen, New Jersey, in Somerset 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 08812 at a glance
| ZIP code | 08812 |
|---|---|
| Primary city | Dunellen |
| State | New Jersey (NJ) |
| County | Somerset FIPS 34035 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 14,224 |
| Coordinates | 40.599900, -74.479790 |
How ZIP+4 works in 08812
The four digits after the hyphen encode a delivery segment inside 08812. 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 08812 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 08812.
| ZIP | City | Distance |
|---|---|---|
| 07063 | Plainfield, NJ | 1.8 mi |
| 08846 | Middlesex, NJ | 2.1 mi |
| 07059 | Warren, NJ | 2.9 mi |
| 07060 | Plainfield, NJ | 3.2 mi |
| 07069 | Watchung, NJ | 3.6 mi |
| 08805 | Bound Brook, NJ | 3.6 mi |
| 08854 | Piscataway, NJ | 3.8 mi |
| 07080 | South Plainfield, NJ | 3.8 mi |
| 08836 | Martinsville, NJ | 3.9 mi |
| 08880 | South Bound Brook, NJ | 4.1 mi |
| 07062 | Plainfield, NJ | 4.5 mi |
| 07980 | Stirling, NJ | 5.3 mi |
Questions about 08812
What is the ZIP+4 code for 08812?
08812 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 08812, you need to look up a specific street address to get them.
What city is 08812?
08812 is assigned to Dunellen, New Jersey, in Somerset 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.