ZIP Code 28368 — Olivia, NC
28368 is a standard (street delivery) ZIP code serving Olivia, North Carolina, in Harnett 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 28368 at a glance
| ZIP code | 28368 |
|---|---|
| Primary city | Olivia |
| State | North Carolina (NC) |
| County | Harnett FIPS 37085 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 50 |
| Coordinates | 35.369420, -79.113310 |
How ZIP+4 works in 28368
The four digits after the hyphen encode a delivery segment inside 28368. 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 28368 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 28368.
| ZIP | City | Distance |
|---|---|---|
| 27332 | Sanford, NC | 1.4 mi |
| 28355 | Lemon Springs, NC | 4.8 mi |
| 28326 | Cameron, NC | 7 mi |
| 27505 | Broadway, NC | 7 mi |
| 27330 | Sanford, NC | 10.9 mi |
| 28394 | Vass, NC | 12.7 mi |
| 28390 | Spring Lake, NC | 13.7 mi |
| 27546 | Lillington, NC | 13.9 mi |
| 28350 | Lakeview, NC | 14.3 mi |
| 28308 | Pope Army Airfield, NC | 14.7 mi |
| 27256 | Gulf, NC | 15.9 mi |
| 28323 | Bunnlevel, NC | 16 mi |
Questions about 28368
What is the ZIP+4 code for 28368?
28368 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 28368, you need to look up a specific street address to get them.
What city is 28368?
28368 is assigned to Olivia, North Carolina, in Harnett 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.