ZIP Code 23430 — Smithfield, VA
23430 is a standard (street delivery) ZIP code serving Smithfield, Virginia, in Isle of Wight 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 23430 at a glance
| ZIP code | 23430 |
|---|---|
| Primary city | Smithfield |
| State | Virginia (VA) |
| County | Isle of Wight FIPS 51093 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 19,109 |
| Coordinates | 36.986150, -76.663370 |
How ZIP+4 works in 23430
The four digits after the hyphen encode a delivery segment inside 23430. 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 23430 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 23430.
| ZIP | City | Distance |
|---|---|---|
| 23304 | Battery Park, VA | 5.2 mi |
| 23314 | Carrollton, VA | 7.4 mi |
| 23487 | Windsor, VA | 9.8 mi |
| 23432 | Suffolk, VA | 10.1 mi |
| 23436 | Suffolk, VA | 10.6 mi |
| 23846 | Elberon, VA | 10.6 mi |
| 23883 | Surry, VA | 10.7 mi |
| 23604 | Fort Eustis, VA | 10.9 mi |
| 23433 | Suffolk, VA | 10.9 mi |
| 23606 | Newport News, VA | 11.2 mi |
| 23602 | Newport News, VA | 12 mi |
| 23601 | Newport News, VA | 12.1 mi |
Questions about 23430
What is the ZIP+4 code for 23430?
23430 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 23430, you need to look up a specific street address to get them.
What city is 23430?
23430 is assigned to Smithfield, Virginia, in Isle of Wight 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.