ZIP Code 42406 — Corydon, KY
42406 is a standard (street delivery) ZIP code serving Corydon, Kentucky, in Henderson 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 42406 at a glance
| ZIP code | 42406 |
|---|---|
| Primary city | Corydon |
| State | Kentucky (KY) |
| County | Henderson FIPS 21101 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 2,345 |
| Coordinates | 37.777920, -87.744960 |
How ZIP+4 works in 42406
The four digits after the hyphen encode a delivery segment inside 42406. 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 42406 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 42406.
| ZIP | City | Distance |
|---|---|---|
| 42462 | Waverly, KY | 3.9 mi |
| 42461 | Uniontown, KY | 7.8 mi |
| 42444 | Poole, KY | 10.9 mi |
| 47712 | Evansville, IN | 11.4 mi |
| 42437 | Morganfield, KY | 12.5 mi |
| 42420 | Henderson, KY | 12.6 mi |
| 42452 | Robards, KY | 13 mi |
| 47620 | Mount Vernon, IN | 13.8 mi |
| 47713 | Evansville, IN | 15.7 mi |
| 42409 | Dixon, KY | 16.4 mi |
| 47708 | Evansville, IN | 16.4 mi |
| 42455 | Sebree, KY | 17.4 mi |
Questions about 42406
What is the ZIP+4 code for 42406?
42406 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 42406, you need to look up a specific street address to get them.
What city is 42406?
42406 is assigned to Corydon, Kentucky, in Henderson 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.