ZIP Code 40023 — Fisherville, KY
40023 is a standard (street delivery) ZIP code serving Fisherville, Kentucky, in Jefferson 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 40023 at a glance
| ZIP code | 40023 |
|---|---|
| Primary city | Fisherville |
| State | Kentucky (KY) |
| County | Jefferson FIPS 21111 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Kentucky/Louisville |
| Population | 6,870 |
| Coordinates | 38.162640, -85.423670 |
How ZIP+4 works in 40023
The four digits after the hyphen encode a delivery segment inside 40023. 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 40023 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 40023.
| ZIP | City | Distance |
|---|---|---|
| 40022 | Finchville, KY | 4.9 mi |
| 40299 | Louisville, KY | 5 mi |
| 40067 | Simpsonville, KY | 5.5 mi |
| 40245 | Louisville, KY | 7.3 mi |
| 40243 | Louisville, KY | 7.9 mi |
| 40071 | Taylorsville, KY | 8.7 mi |
| 40291 | Louisville, KY | 8.7 mi |
| 40223 | Louisville, KY | 9.4 mi |
| 40056 | Pewee Valley, KY | 10.5 mi |
| 40047 | Mount Washington, KY | 11 mi |
| 40220 | Louisville, KY | 11.1 mi |
| 40228 | Louisville, KY | 11.3 mi |
Questions about 40023
What is the ZIP+4 code for 40023?
40023 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 40023, you need to look up a specific street address to get them.
What city is 40023?
40023 is assigned to Fisherville, Kentucky, in Jefferson 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.