ZIP Code 29856 — Windsor, SC
29856 is a standard (street delivery) ZIP code serving Windsor, South Carolina, in Aiken 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 29856 at a glance
| ZIP code | 29856 |
|---|---|
| Primary city | Windsor |
| State | South Carolina (SC) |
| County | Aiken FIPS 45003 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 3,272 |
| Coordinates | 33.483650, -81.512760 |
How ZIP+4 works in 29856
The four digits after the hyphen encode a delivery segment inside 29856. 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 29856 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 29856.
| ZIP | City | Distance |
|---|---|---|
| 29853 | Williston, SC | 7.5 mi |
| 29826 | Elko, SC | 10.9 mi |
| 29803 | Aiken, SC | 11 mi |
| 29809 | New Ellenton, SC | 11.1 mi |
| 29146 | Springfield, SC | 12.5 mi |
| 29805 | Aiken, SC | 12.7 mi |
| 29801 | Aiken, SC | 12.8 mi |
| 29164 | Wagener, SC | 13 mi |
| 29137 | Salley, SC | 13.4 mi |
| 29817 | Blackville, SC | 16 mi |
| 29851 | Warrenville, SC | 17.6 mi |
| 29828 | Gloverville, SC | 18.4 mi |
Questions about 29856
What is the ZIP+4 code for 29856?
29856 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 29856, you need to look up a specific street address to get them.
What city is 29856?
29856 is assigned to Windsor, South Carolina, in Aiken 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.