ZIP Code 66040 — La Cygne, KS
66040 is a standard (street delivery) ZIP code serving La Cygne, Kansas, in Linn 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 66040 at a glance
| ZIP code | 66040 |
|---|---|
| Primary city | La Cygne |
| State | Kansas (KS) |
| County | Linn FIPS 20107 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 3,651 |
| Coordinates | 38.353960, -94.739490 |
How ZIP+4 works in 66040
The four digits after the hyphen encode a delivery segment inside 66040. 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 66040 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 66040.
| ZIP | City | Distance |
|---|---|---|
| 66026 | Fontana, KS | 7 mi |
| 64723 | Amsterdam, MO | 10.1 mi |
| 66075 | Pleasanton, KS | 10.7 mi |
| 64722 | Amoret, MO | 11.6 mi |
| 66072 | Parker, KS | 12.9 mi |
| 64742 | Drexel, MO | 14.7 mi |
| 66056 | Mound City, KS | 15.2 mi |
| 66064 | Osawatomie, KS | 15.9 mi |
| 66053 | Louisburg, KS | 15.9 mi |
| 66014 | Centerville, KS | 16 mi |
| 66071 | Paola, KS | 16.6 mi |
| 64745 | Foster, MO | 18.7 mi |
Questions about 66040
What is the ZIP+4 code for 66040?
66040 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 66040, you need to look up a specific street address to get them.
What city is 66040?
66040 is assigned to La Cygne, Kansas, in Linn 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.