ZIP Code 07203 — Roselle, NJ
07203 is a standard (street delivery) ZIP code serving Roselle, New Jersey, in Union 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 07203 at a glance
| ZIP code | 07203 |
|---|---|
| Primary city | Roselle |
| State | New Jersey (NJ) |
| County | Union FIPS 34039 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 22,646 |
| Coordinates | 40.652690, -74.259900 |
How ZIP+4 works in 07203
The four digits after the hyphen encode a delivery segment inside 07203. 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 07203 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 07203.
| ZIP | City | Distance |
|---|---|---|
| 07204 | Roselle Park, NJ | 0.9 mi |
| 07036 | Linden, NJ | 2.2 mi |
| 07033 | Kenilworth, NJ | 2.3 mi |
| 07202 | Elizabeth, NJ | 2.3 mi |
| 07016 | Cranford, NJ | 2.3 mi |
| 07208 | Elizabeth, NJ | 2.4 mi |
| 07083 | Union, NJ | 2.9 mi |
| 07065 | Rahway, NJ | 3.3 mi |
| 07027 | Garwood, NJ | 3.3 mi |
| 07205 | Hillside, NJ | 3.4 mi |
| 07066 | Clark, NJ | 3.6 mi |
| 07206 | Elizabethport, NJ | 4 mi |
Questions about 07203
What is the ZIP+4 code for 07203?
07203 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 07203, you need to look up a specific street address to get them.
What city is 07203?
07203 is assigned to Roselle, New Jersey, in Union 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.