ZIP Code 40312 — Clay City, KY
40312 is a standard (street delivery) ZIP code serving Clay City, Kentucky, in Powell 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 40312 at a glance
| ZIP code | 40312 |
|---|---|
| Primary city | Clay City |
| State | Kentucky (KY) |
| County | Powell FIPS 21197 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 5,994 |
| Coordinates | 37.843860, -83.930130 |
How ZIP+4 works in 40312
The four digits after the hyphen encode a delivery segment inside 40312. 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 40312 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 40312.
| ZIP | City | Distance |
|---|---|---|
| 40380 | Stanton, KY | 8.3 mi |
| 40337 | Jeffersonville, KY | 8.5 mi |
| 40472 | Ravenna, KY | 9.2 mi |
| 40336 | Irvine, KY | 11.4 mi |
| 40385 | Waco, KY | 13.1 mi |
| 40376 | Slade, KY | 13.4 mi |
| 40346 | Means, KY | 14 mi |
| 40391 | Winchester, KY | 14.6 mi |
| 40353 | Mount Sterling, KY | 15.3 mi |
| 40334 | Hope, KY | 15.6 mi |
| 41360 | Pine Ridge, KY | 17 mi |
| 40322 | Frenchburg, KY | 17.3 mi |
Questions about 40312
What is the ZIP+4 code for 40312?
40312 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 40312, you need to look up a specific street address to get them.
What city is 40312?
40312 is assigned to Clay City, Kentucky, in Powell 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.