ZIP Code 23356 — Greenbackville, VA
23356 is a standard (street delivery) ZIP code serving Greenbackville, Virginia, in Accomack 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 23356 at a glance
| ZIP code | 23356 |
|---|---|
| Primary city | Greenbackville |
| State | Virginia (VA) |
| County | Accomack FIPS 51001 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 1,628 |
| Coordinates | 37.990500, -75.392280 |
How ZIP+4 works in 23356
The four digits after the hyphen encode a delivery segment inside 23356. 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 23356 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 23356.
| ZIP | City | Distance |
|---|---|---|
| 23395 | Horntown, VA | 3.5 mi |
| 21864 | Stockton, MD | 3.7 mi |
| 23336 | Chincoteague Island, VA | 3.9 mi |
| 23337 | Wallops Island, VA | 5.7 mi |
| 21829 | Girdletree, MD | 7.5 mi |
| 23415 | New Church, VA | 7.8 mi |
| 23303 | Atlantic, VA | 8.6 mi |
| 23416 | Oak Hall, VA | 9.8 mi |
| 21851 | Pocomoke City, MD | 10.2 mi |
| 23442 | Temperanceville, VA | 11.4 mi |
| 23302 | Assawoman, VA | 11.5 mi |
| 23488 | Withams, VA | 12 mi |
Questions about 23356
What is the ZIP+4 code for 23356?
23356 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 23356, you need to look up a specific street address to get them.
What city is 23356?
23356 is assigned to Greenbackville, Virginia, in Accomack 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.