ZIP Code 66027 — Fort Leavenworth, KS
66027 is a standard (street delivery) ZIP code serving Fort Leavenworth, Kansas, in Leavenworth 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 66027 at a glance
| ZIP code | 66027 |
|---|---|
| Primary city | Fort Leavenworth |
| State | Kansas (KS) |
| County | Leavenworth FIPS 20103 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 7,365 |
| Coordinates | 39.364540, -94.917080 |
How ZIP+4 works in 66027
The four digits after the hyphen encode a delivery segment inside 66027. 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 66027 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 66027.
| ZIP | City | Distance |
|---|---|---|
| 64098 | Weston, MO | 6.5 mi |
| 64079 | Platte City, MO | 6.6 mi |
| 66048 | Leavenworth, KS | 6.9 mi |
| 64028 | Farley, MO | 6.9 mi |
| 66043 | Lansing, KS | 8 mi |
| 66020 | Easton, KS | 10.3 mi |
| 64092 | Waldron, MO | 11.4 mi |
| 64018 | Camden Point, MO | 11.5 mi |
| 64153 | Kansas City, MO | 11.5 mi |
| 64163 | Kansas City, MO | 12.3 mi |
| 64439 | Dearborn, MO | 14.1 mi |
| 64484 | Rushville, MO | 14.3 mi |
Questions about 66027
What is the ZIP+4 code for 66027?
66027 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 66027, you need to look up a specific street address to get them.
What city is 66027?
66027 is assigned to Fort Leavenworth, Kansas, in Leavenworth 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.