ZIP Code 66021 — Edgerton, KS
66021 is a standard (street delivery) ZIP code serving Edgerton, 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 66021 at a glance
| ZIP code | 66021 |
|---|---|
| Primary city | Edgerton |
| State | Kansas (KS) |
| County | Johnson FIPS 20091 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 2,819 |
| Coordinates | 38.759390, -95.006920 |
How ZIP+4 works in 66021
The four digits after the hyphen encode a delivery segment inside 66021. 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 66021 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 66021.
| ZIP | City | Distance |
|---|---|---|
| 66030 | Gardner, KS | 5.2 mi |
| 66092 | Wellsville, KS | 7 mi |
| 66031 | New Century, KS | 7.9 mi |
| 66083 | Spring Hill, KS | 9.5 mi |
| 66025 | Eudora, KS | 10.3 mi |
| 66061 | Olathe, KS | 11.6 mi |
| 66006 | Baldwin City, KS | 12.7 mi |
| 66062 | Olathe, KS | 13.1 mi |
| 66018 | De Soto, KS | 14.3 mi |
| 66071 | Paola, KS | 14.9 mi |
| 66046 | Lawrence, KS | 15.1 mi |
| 66079 | Rantoul, KS | 16.3 mi |
Questions about 66021
What is the ZIP+4 code for 66021?
66021 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 66021, you need to look up a specific street address to get them.
What city is 66021?
66021 is assigned to Edgerton, 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.