ZIP Code 29474 — Round O, SC
29474 is a standard (street delivery) ZIP code serving Round O, South Carolina, in Colleton 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 29474 at a glance
| ZIP code | 29474 |
|---|---|
| Primary city | Round O |
| State | South Carolina (SC) |
| County | Colleton FIPS 45029 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 1,420 |
| Coordinates | 32.908330, -80.524480 |
How ZIP+4 works in 29474
The four digits after the hyphen encode a delivery segment inside 29474. 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 29474 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 29474.
| ZIP | City | Distance |
|---|---|---|
| 29435 | Cottageville, SC | 4.5 mi |
| 29488 | Walterboro, SC | 8.7 mi |
| 29426 | Adams Run, SC | 12 mi |
| 29452 | Jacksonboro, SC | 14.7 mi |
| 29472 | Ridgeville, SC | 15.6 mi |
| 29437 | Dorchester, SC | 16.8 mi |
| 29475 | Ruffin, SC | 17.5 mi |
| 29470 | Ravenel, SC | 17.7 mi |
| 29477 | Saint George, SC | 18 mi |
| 29483 | Summerville, SC | 18.9 mi |
| 29485 | Summerville, SC | 19.3 mi |
| 29446 | Green Pond, SC | 19.4 mi |
Questions about 29474
What is the ZIP+4 code for 29474?
29474 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 29474, you need to look up a specific street address to get them.
What city is 29474?
29474 is assigned to Round O, South Carolina, in Colleton 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.