ZIP Code 28365 — Mount Olive, NC
28365 is a standard (street delivery) ZIP code serving Mount Olive, North Carolina, in Duplin 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 28365 at a glance
| ZIP code | 28365 |
|---|---|
| Primary city | Mount Olive |
| State | North Carolina (NC) |
| County | Duplin FIPS 37061 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 15,999 |
| Coordinates | 35.178070, -78.058270 |
How ZIP+4 works in 28365
The four digits after the hyphen encode a delivery segment inside 28365. 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 28365 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 28365.
| ZIP | City | Distance |
|---|---|---|
| 28325 | Calypso, NC | 3.1 mi |
| 28333 | Dudley, NC | 7.7 mi |
| 28341 | Faison, NC | 7.8 mi |
| 28578 | Seven Springs, NC | 11.1 mi |
| 27531 | Goldsboro, NC | 12.5 mi |
| 28398 | Warsaw, NC | 12.8 mi |
| 27530 | Goldsboro, NC | 13.2 mi |
| 28508 | Albertson, NC | 14.2 mi |
| 27533 | Goldsboro, NC | 14.5 mi |
| 28393 | Turkey, NC | 15.4 mi |
| 28349 | Kenansville, NC | 15.6 mi |
| 27534 | Goldsboro, NC | 15.9 mi |
Questions about 28365
What is the ZIP+4 code for 28365?
28365 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 28365, you need to look up a specific street address to get them.
What city is 28365?
28365 is assigned to Mount Olive, North Carolina, in Duplin 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.