ZIP Code 66054 — Mclouth, KS
66054 is a standard (street delivery) ZIP code serving Mclouth, Kansas, in Jefferson 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 66054 at a glance
| ZIP code | 66054 |
|---|---|
| Primary city | Mclouth |
| State | Kansas (KS) |
| County | Jefferson FIPS 20087 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 2,777 |
| Coordinates | 39.205500, -95.195180 |
How ZIP+4 works in 66054
The four digits after the hyphen encode a delivery segment inside 66054. 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 66054 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 66054.
| ZIP | City | Distance |
|---|---|---|
| 66066 | Oskaloosa, KS | 7.3 mi |
| 66086 | Tonganoxie, KS | 8.7 mi |
| 66097 | Winchester, KS | 8.9 mi |
| 66020 | Easton, KS | 10.5 mi |
| 66044 | Lawrence, KS | 12 mi |
| 66048 | Leavenworth, KS | 12.3 mi |
| 66073 | Perry, KS | 12.7 mi |
| 66070 | Ozawkie, KS | 13.7 mi |
| 66007 | Basehor, KS | 14.1 mi |
| 66052 | Linwood, KS | 15.7 mi |
| 66043 | Lansing, KS | 16 mi |
| 66060 | Nortonville, KS | 16.4 mi |
Questions about 66054
What is the ZIP+4 code for 66054?
66054 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 66054, you need to look up a specific street address to get them.
What city is 66054?
66054 is assigned to Mclouth, Kansas, in Jefferson 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.