ZIP Code 42420 — Henderson, KY
42420 is a standard (street delivery) ZIP code serving Henderson, 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 42420 at a glance
| ZIP code | 42420 |
|---|---|
| Primary city | Henderson |
| State | Kentucky (KY) |
| County | Henderson FIPS 21101 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 38,133 |
| Coordinates | 37.798750, -87.515170 |
How ZIP+4 works in 42420
The four digits after the hyphen encode a delivery segment inside 42420. 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 42420 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 42420.
| ZIP | City | Distance |
|---|---|---|
| 42458 | Spottsville, KY | 6.2 mi |
| 42452 | Robards, KY | 7.9 mi |
| 42451 | Reed, KY | 8.9 mi |
| 47713 | Evansville, IN | 10.5 mi |
| 47714 | Evansville, IN | 11 mi |
| 47712 | Evansville, IN | 11.9 mi |
| 47715 | Evansville, IN | 12.1 mi |
| 47708 | Evansville, IN | 12.5 mi |
| 42406 | Corydon, KY | 12.6 mi |
| 42356 | Maple Mount, KY | 12.7 mi |
| 42444 | Poole, KY | 13 mi |
| 47630 | Newburgh, IN | 13.9 mi |
Questions about 42420
What is the ZIP+4 code for 42420?
42420 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 42420, you need to look up a specific street address to get them.
What city is 42420?
42420 is assigned to Henderson, 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.