ZIP Code 40843 — Holmes Mill, KY
40843 is a standard (street delivery) ZIP code serving Holmes Mill, Kentucky, in Harlan 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 40843 at a glance
| ZIP code | 40843 |
|---|---|
| Primary city | Holmes Mill |
| State | Kentucky (KY) |
| County | Harlan FIPS 21095 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 48 |
| Coordinates | 36.888260, -82.936660 |
How ZIP+4 works in 40843
The four digits after the hyphen encode a delivery segment inside 40843. 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 40843 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 40843.
| ZIP | City | Distance |
|---|---|---|
| 24265 | Keokee, VA | 3.5 mi |
| 40855 | Lynch, KY | 4.7 mi |
| 40927 | Closplint, KY | 5.4 mi |
| 40807 | Benham, KY | 5.4 mi |
| 40823 | Cumberland, KY | 5.5 mi |
| 24243 | Dryden, VA | 7.4 mi |
| 24282 | Saint Charles, VA | 8 mi |
| 24216 | Appalachia, VA | 8.6 mi |
| 40862 | Partridge, KY | 9.4 mi |
| 41833 | Linefork, KY | 9.9 mi |
| 41819 | Gordon, KY | 10.6 mi |
| 24246 | East Stone Gap, VA | 10.7 mi |
Questions about 40843
What is the ZIP+4 code for 40843?
40843 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 40843, you need to look up a specific street address to get them.
What city is 40843?
40843 is assigned to Holmes Mill, Kentucky, in Harlan 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.