ZIP Code 23418 — Onley, VA
23418 is a standard (street delivery) ZIP code serving Onley, 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 23418 at a glance
| ZIP code | 23418 |
|---|---|
| Primary city | Onley |
| State | Virginia (VA) |
| County | Accomack FIPS 51001 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 753 |
| Coordinates | 37.638210, -75.669260 |
How ZIP+4 works in 23418
The four digits after the hyphen encode a delivery segment inside 23418. 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 23418 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 23418.
| ZIP | City | Distance |
|---|---|---|
| 23480 | Wachapreague, VA | 2 mi |
| 23301 | Accomac, VA | 3.5 mi |
| 23410 | Melfa, VA | 4 mi |
| 23441 | Tasley, VA | 5.4 mi |
| 23401 | Keller, VA | 6 mi |
| 23357 | Greenbush, VA | 8.3 mi |
| 23417 | Onancock, VA | 8.3 mi |
| 23422 | Pungoteague, VA | 8.5 mi |
| 23420 | Painter, VA | 8.7 mi |
| 23423 | Quinby, VA | 8.8 mi |
| 23389 | Harborton, VA | 9 mi |
| 23421 | Parksley, VA | 9.3 mi |
Questions about 23418
What is the ZIP+4 code for 23418?
23418 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 23418, you need to look up a specific street address to get them.
What city is 23418?
23418 is assigned to Onley, 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.