ZIP Code 66018 — De Soto, KS
66018 is a standard (street delivery) ZIP code serving De Soto, Kansas, in Johnson 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 66018 at a glance
| ZIP code | 66018 |
|---|---|
| Primary city | De Soto |
| State | Kansas (KS) |
| County | Johnson FIPS 20091 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 6,584 |
| Coordinates | 38.965240, -94.972320 |
How ZIP+4 works in 66018
The four digits after the hyphen encode a delivery segment inside 66018. 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 66018 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 66018.
| ZIP | City | Distance |
|---|---|---|
| 66052 | Linwood, KS | 5 mi |
| 66227 | Lenexa, KS | 5.3 mi |
| 66061 | Olathe, KS | 6.9 mi |
| 66012 | Bonner Springs, KS | 7.2 mi |
| 66025 | Eudora, KS | 7.3 mi |
| 66226 | Shawnee, KS | 7.5 mi |
| 66220 | Lenexa, KS | 8.1 mi |
| 66218 | Shawnee, KS | 9 mi |
| 66031 | New Century, KS | 10.3 mi |
| 66219 | Lenexa, KS | 10.5 mi |
| 66030 | Gardner, KS | 10.5 mi |
| 66217 | Shawnee, KS | 10.9 mi |
Questions about 66018
What is the ZIP+4 code for 66018?
66018 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 66018, you need to look up a specific street address to get them.
What city is 66018?
66018 is assigned to De Soto, Kansas, in Johnson 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.