ZIP Code 08852 — Monmouth Junction, NJ
08852 is a standard (street delivery) ZIP code serving Monmouth Junction, 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 08852 at a glance
| ZIP code | 08852 |
|---|---|
| Primary city | Monmouth Junction |
| State | New Jersey (NJ) |
| County | Middlesex FIPS 34023 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 18,062 |
| Coordinates | 40.389780, -74.544610 |
How ZIP+4 works in 08852
The four digits after the hyphen encode a delivery segment inside 08852. 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 08852 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 08852.
| ZIP | City | Distance |
|---|---|---|
| 08824 | Kendall Park, NJ | 2.2 mi |
| 08810 | Dayton, NJ | 2.9 mi |
| 08823 | Franklin Park, NJ | 3.7 mi |
| 08528 | Kingston, NJ | 3.8 mi |
| 08536 | Plainsboro, NJ | 4.4 mi |
| 08512 | Cranbury, NJ | 4.8 mi |
| 08902 | North Brunswick, NJ | 4.8 mi |
| 08553 | Rocky Hill, NJ | 5.1 mi |
| 08540 | Princeton, NJ | 6.1 mi |
| 08828 | Helmetta, NJ | 6.4 mi |
| 08542 | Princeton, NJ | 6.6 mi |
| 08544 | Princeton, NJ | 6.7 mi |
Questions about 08852
What is the ZIP+4 code for 08852?
08852 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 08852, you need to look up a specific street address to get them.
What city is 08852?
08852 is assigned to Monmouth Junction, 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.