ZIP Code 23066 — Gwynn, VA
23066 is a standard (street delivery) ZIP code serving Gwynn, Virginia, in Mathews 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 23066 at a glance
| ZIP code | 23066 |
|---|---|
| Primary city | Gwynn |
| State | Virginia (VA) |
| County | Mathews FIPS 51115 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 514 |
| Coordinates | 37.498360, -76.288310 |
How ZIP+4 works in 23066
The four digits after the hyphen encode a delivery segment inside 23066. 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 23066 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 23066.
| ZIP | City | Distance |
|---|---|---|
| 23076 | Hudgins, VA | 2 mi |
| 23068 | Hallieford, VA | 2.7 mi |
| 23119 | Moon, VA | 3.3 mi |
| 23035 | Cobbs Creek, VA | 4.8 mi |
| 23045 | Diggs, VA | 4.9 mi |
| 23109 | Mathews, VA | 4.9 mi |
| 23043 | Deltaville, VA | 5 mi |
| 23070 | Hardyville, VA | 6.4 mi |
| 23025 | Cardinal, VA | 7.1 mi |
| 23050 | Dutton, VA | 7.2 mi |
| 23130 | Onemo, VA | 7.6 mi |
| 23056 | Foster, VA | 7.7 mi |
Questions about 23066
What is the ZIP+4 code for 23066?
23066 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 23066, you need to look up a specific street address to get them.
What city is 23066?
23066 is assigned to Gwynn, Virginia, in Mathews 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.