ZIP Code 40823 — Cumberland, KY
40823 is a standard (street delivery) ZIP code serving Cumberland, 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 40823 at a glance
| ZIP code | 40823 |
|---|---|
| Primary city | Cumberland |
| State | Kentucky (KY) |
| County | Harlan FIPS 21095 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 3,742 |
| Coordinates | 36.956640, -82.988640 |
How ZIP+4 works in 40823
The four digits after the hyphen encode a delivery segment inside 40823. 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 40823 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 40823.
| ZIP | City | Distance |
|---|---|---|
| 40807 | Benham, KY | 1.9 mi |
| 40855 | Lynch, KY | 5 mi |
| 41833 | Linefork, KY | 5.1 mi |
| 40927 | Closplint, KY | 5.2 mi |
| 41819 | Gordon, KY | 5.5 mi |
| 40843 | Holmes Mill, KY | 5.5 mi |
| 41735 | Delphia, KY | 7.4 mi |
| 40862 | Partridge, KY | 7.6 mi |
| 41821 | Hallie, KY | 8.3 mi |
| 24265 | Keokee, VA | 8.6 mi |
| 40870 | Totz, KY | 9 mi |
| 40849 | Lejunior, KY | 9 mi |
Questions about 40823
What is the ZIP+4 code for 40823?
40823 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 40823, you need to look up a specific street address to get them.
What city is 40823?
40823 is assigned to Cumberland, 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.