ZIP Code 29378 — Una, SC
29378 is a standard (street delivery) ZIP code serving Una, South Carolina, in Spartanburg 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 29378 at a glance
| ZIP code | 29378 |
|---|---|
| Primary city | Una |
| State | South Carolina (SC) |
| County | Spartanburg FIPS 45083 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 261 |
| Coordinates | 34.966840, -81.968570 |
How ZIP+4 works in 29378
The four digits after the hyphen encode a delivery segment inside 29378. 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 29378 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 29378.
| ZIP | City | Distance |
|---|---|---|
| 29320 | Arcadia, SC | 1.5 mi |
| 29303 | Spartanburg, SC | 1.9 mi |
| 29301 | Spartanburg, SC | 3.3 mi |
| 29333 | Drayton, SC | 3.3 mi |
| 29316 | Boiling Springs, SC | 5.2 mi |
| 29306 | Spartanburg, SC | 5.7 mi |
| 29385 | Wellford, SC | 7.6 mi |
| 29346 | Glendale, SC | 7.6 mi |
| 29369 | Moore, SC | 7.6 mi |
| 29329 | Converse, SC | 7.7 mi |
| 29377 | Startex, SC | 7.7 mi |
| 29307 | Spartanburg, SC | 7.8 mi |
Questions about 29378
What is the ZIP+4 code for 29378?
29378 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 29378, you need to look up a specific street address to get them.
What city is 29378?
29378 is assigned to Una, South Carolina, in Spartanburg 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.