ZIP Code 08501 — Allentown, NJ
08501 is a standard (street delivery) ZIP code serving Allentown, New Jersey, in Monmouth 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 08501 at a glance
| ZIP code | 08501 |
|---|---|
| Primary city | Allentown |
| State | New Jersey (NJ) |
| County | Monmouth FIPS 34025 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 6,364 |
| Coordinates | 40.160220, -74.552370 |
How ZIP+4 works in 08501
The four digits after the hyphen encode a delivery segment inside 08501. 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 08501 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 08501.
| ZIP | City | Distance |
|---|---|---|
| 08514 | Cream Ridge, NJ | 3.4 mi |
| 08691 | Robbinsville, NJ | 4.2 mi |
| 08620 | Trenton, NJ | 5.2 mi |
| 08515 | Chesterfield, NJ | 5.8 mi |
| 08555 | Roosevelt, NJ | 5.9 mi |
| 08561 | Windsor, NJ | 6.2 mi |
| 08520 | Hightstown, NJ | 6.7 mi |
| 08562 | Wrightstown, NJ | 6.7 mi |
| 08510 | Millstone Township, NJ | 7.1 mi |
| 08690 | Trenton, NJ | 7.3 mi |
| 08535 | Millstone Township, NJ | 8 mi |
| 08511 | Cookstown, NJ | 8 mi |
Questions about 08501
What is the ZIP+4 code for 08501?
08501 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 08501, you need to look up a specific street address to get them.
What city is 08501?
08501 is assigned to Allentown, New Jersey, in Monmouth 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.