ZIP Code 28778 — Swannanoa, NC
28778 is a standard (street delivery) ZIP code serving Swannanoa, North Carolina, in Buncombe 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 28778 at a glance
| ZIP code | 28778 |
|---|---|
| Primary city | Swannanoa |
| State | North Carolina (NC) |
| County | Buncombe FIPS 37021 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 13,536 |
| Coordinates | 35.616670, -82.407680 |
How ZIP+4 works in 28778
The four digits after the hyphen encode a delivery segment inside 28778. 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 28778 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 28778.
| ZIP | City | Distance |
|---|---|---|
| 28805 | Asheville, NC | 4 mi |
| 28757 | Montreat, NC | 6.4 mi |
| 28730 | Fairview, NC | 6.4 mi |
| 28711 | Black Mountain, NC | 6.9 mi |
| 28770 | Ridgecrest, NC | 7.3 mi |
| 28801 | Asheville, NC | 8.6 mi |
| 28803 | Asheville, NC | 8.7 mi |
| 28804 | Asheville, NC | 8.9 mi |
| 28787 | Weaverville, NC | 10 mi |
| 28709 | Barnardsville, NC | 10.1 mi |
| 28735 | Gerton, NC | 10.3 mi |
| 28806 | Asheville, NC | 12 mi |
Questions about 28778
What is the ZIP+4 code for 28778?
28778 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 28778, you need to look up a specific street address to get them.
What city is 28778?
28778 is assigned to Swannanoa, North Carolina, in Buncombe 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.