ZIP Code 42223 — Fort Campbell, KY
42223 is a standard (street delivery) ZIP code serving Fort Campbell, Kentucky, in Montgomery 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 42223 at a glance
| ZIP code | 42223 |
|---|---|
| Primary city | Fort Campbell |
| State | Kentucky (KY) |
| County | Montgomery FIPS 47125 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 19,006 |
| Coordinates | 36.638100, -87.472580 |
How ZIP+4 works in 42223
The four digits after the hyphen encode a delivery segment inside 42223. 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 42223 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 42223.
| ZIP | City | Distance |
|---|---|---|
| 42262 | Oak Grove, KY | 3.5 mi |
| 37042 | Clarksville, TN | 5.8 mi |
| 42254 | La Fayette, KY | 9.4 mi |
| 37191 | Woodlawn, TN | 9.5 mi |
| 42236 | Herndon, KY | 9.6 mi |
| 42266 | Pembroke, KY | 10.8 mi |
| 37040 | Clarksville, TN | 11 mi |
| 42286 | Trenton, KY | 12.8 mi |
| 37079 | Indian Mound, TN | 14.9 mi |
| 37142 | Palmyra, TN | 15.7 mi |
| 37043 | Clarksville, TN | 16.4 mi |
| 42240 | Hopkinsville, KY | 17 mi |
Questions about 42223
What is the ZIP+4 code for 42223?
42223 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 42223, you need to look up a specific street address to get them.
What city is 42223?
42223 is assigned to Fort Campbell, Kentucky, in Montgomery 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.