ZIP Code 08857 — Old Bridge, NJ
08857 is a standard (street delivery) ZIP code serving Old Bridge, New Jersey, in Middlesex 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 08857 at a glance
| ZIP code | 08857 |
|---|---|
| Primary city | Old Bridge |
| State | New Jersey (NJ) |
| County | Middlesex FIPS 34023 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 40,891 |
| Coordinates | 40.391880, -74.330590 |
How ZIP+4 works in 08857
The four digits after the hyphen encode a delivery segment inside 08857. 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 08857 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 08857.
| ZIP | City | Distance |
|---|---|---|
| 08884 | Spotswood, NJ | 3.2 mi |
| 07751 | Morganville, NJ | 4.3 mi |
| 07747 | Matawan, NJ | 4.4 mi |
| 08882 | South River, NJ | 4.5 mi |
| 08859 | Parlin, NJ | 4.8 mi |
| 08828 | Helmetta, NJ | 5 mi |
| 08872 | Sayreville, NJ | 5.1 mi |
| 08816 | East Brunswick, NJ | 5.2 mi |
| 08879 | South Amboy, NJ | 5.8 mi |
| 07721 | Cliffwood, NJ | 5.8 mi |
| 07746 | Marlboro, NJ | 6.7 mi |
| 08831 | Monroe Township, NJ | 6.8 mi |
Questions about 08857
What is the ZIP+4 code for 08857?
08857 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 08857, you need to look up a specific street address to get them.
What city is 08857?
08857 is assigned to Old Bridge, New Jersey, in Middlesex 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.