ZIP Code 40051 — New Haven, KY
40051 is a standard (street delivery) ZIP code serving New Haven, Kentucky, in Nelson 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 40051 at a glance
| ZIP code | 40051 |
|---|---|
| Primary city | New Haven |
| State | Kentucky (KY) |
| County | Nelson FIPS 21179 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 4,658 |
| Coordinates | 37.652930, -85.579490 |
How ZIP+4 works in 40051
The four digits after the hyphen encode a delivery segment inside 40051. 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 40051 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 40051.
| ZIP | City | Distance |
|---|---|---|
| 40052 | New Hope, KY | 6 mi |
| 40107 | Boston, KY | 8.7 mi |
| 40062 | Saint Francis, KY | 8.9 mi |
| 42748 | Hodgenville, KY | 9.1 mi |
| 40037 | Loretto, KY | 9.2 mi |
| 40049 | Nerinx, KY | 10 mi |
| 40060 | Raywick, KY | 11 mi |
| 40004 | Bardstown, KY | 12 mi |
| 42716 | Buffalo, KY | 12.5 mi |
| 40063 | Saint Mary, KY | 14.1 mi |
| 42701 | Elizabethtown, KY | 14.6 mi |
| 42764 | Mount Sherman, KY | 15.6 mi |
Questions about 40051
What is the ZIP+4 code for 40051?
40051 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 40051, you need to look up a specific street address to get them.
What city is 40051?
40051 is assigned to New Haven, Kentucky, in Nelson 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.