ZIP Code 66203 — Shawnee, KS
66203 is a standard (street delivery) ZIP code serving Shawnee, 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 66203 at a glance
| ZIP code | 66203 |
|---|---|
| Primary city | Shawnee |
| State | Kansas (KS) |
| County | Johnson FIPS 20091 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 19,441 |
| Coordinates | 39.021600, -94.705580 |
How ZIP+4 works in 66203
The four digits after the hyphen encode a delivery segment inside 66203. 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 66203 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.
Other ZIP codes in Shawnee
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 66203.
| ZIP | City | Distance |
|---|---|---|
| 66216 | Shawnee, KS | 2 mi |
| 66202 | Mission, KS | 2 mi |
| 66204 | Overland Park, KS | 2.5 mi |
| 66106 | Kansas City, KS | 3.1 mi |
| 66217 | Shawnee, KS | 3.9 mi |
| 66214 | Overland Park, KS | 4 mi |
| 66205 | Mission, KS | 4.1 mi |
| 66208 | Prairie Village, KS | 4.3 mi |
| 66212 | Overland Park, KS | 4.7 mi |
| 66215 | Lenexa, KS | 4.9 mi |
| 66103 | Kansas City, KS | 5 mi |
| 66207 | Overland Park, KS | 5.6 mi |
Questions about 66203
What is the ZIP+4 code for 66203?
66203 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 66203, you need to look up a specific street address to get them.
What city is 66203?
66203 is assigned to Shawnee, 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.