ZIP Code 29817 — Blackville, SC
29817 is a standard (street delivery) ZIP code serving Blackville, South Carolina, in Barnwell 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 29817 at a glance
| ZIP code | 29817 |
|---|---|
| Primary city | Blackville |
| State | South Carolina (SC) |
| County | Barnwell FIPS 45011 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 4,139 |
| Coordinates | 33.369890, -81.270960 |
How ZIP+4 works in 29817
The four digits after the hyphen encode a delivery segment inside 29817. 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 29817 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 29817.
| ZIP | City | Distance |
|---|---|---|
| 29826 | Elko, SC | 5.6 mi |
| 29042 | Denmark, SC | 8.3 mi |
| 29113 | Norway, SC | 9.2 mi |
| 29853 | Williston, SC | 9.5 mi |
| 29146 | Springfield, SC | 9.7 mi |
| 29812 | Barnwell, SC | 12.6 mi |
| 29843 | Olar, SC | 13.8 mi |
| 29107 | Neeses, SC | 13.8 mi |
| 29137 | Salley, SC | 15.9 mi |
| 29856 | Windsor, SC | 16 mi |
| 29038 | Cope, SC | 16.7 mi |
| 29003 | Bamberg, SC | 17 mi |
Questions about 29817
What is the ZIP+4 code for 29817?
29817 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 29817, you need to look up a specific street address to get them.
What city is 29817?
29817 is assigned to Blackville, South Carolina, in Barnwell 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.