ZIP Code 28540 — Jacksonville, NC
28540 is a standard (street delivery) ZIP code serving Jacksonville, North Carolina, in Onslow 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 28540 at a glance
| ZIP code | 28540 |
|---|---|
| Primary city | Jacksonville |
| State | North Carolina (NC) |
| County | Onslow FIPS 37133 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 49,141 |
| Coordinates | 34.743610, -77.498330 |
How ZIP+4 works in 28540
The four digits after the hyphen encode a delivery segment inside 28540. 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 28540 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.
Other ZIP codes in Jacksonville
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 28540.
| ZIP | City | Distance |
|---|---|---|
| 28542 | Camp Lejeune, NC | 2.3 mi |
| 28543 | Tarawa Terrace, NC | 5.7 mi |
| 28546 | Jacksonville, NC | 8.9 mi |
| 28454 | Maple Hill, NC | 10.2 mi |
| 28544 | Midway Park, NC | 10.6 mi |
| 28574 | Richlands, NC | 10.6 mi |
| 28547 | Camp Lejeune, NC | 11.2 mi |
| 28445 | Holly Ridge, NC | 14.1 mi |
| 28521 | Chinquapin, NC | 14.5 mi |
| 28539 | Hubert, NC | 15.3 mi |
| 28460 | Sneads Ferry, NC | 15.7 mi |
| 28555 | Maysville, NC | 16.8 mi |
Questions about 28540
What is the ZIP+4 code for 28540?
28540 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 28540, you need to look up a specific street address to get them.
What city is 28540?
28540 is assigned to Jacksonville, North Carolina, in Onslow 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.