ZIP Code 66833 — Allen, KS
66833 is a standard (street delivery) ZIP code serving Allen, Kansas, in Lyon 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 66833 at a glance
| ZIP code | 66833 |
|---|---|
| Primary city | Allen |
| State | Kansas (KS) |
| County | Lyon FIPS 20111 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 641 |
| Coordinates | 38.676940, -96.183740 |
How ZIP+4 works in 66833
The four digits after the hyphen encode a delivery segment inside 66833. 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 66833 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 66833.
| ZIP | City | Distance |
|---|---|---|
| 66830 | Admire, KS | 7.6 mi |
| 66835 | Americus, KS | 10.7 mi |
| 66423 | Eskridge, KS | 12.2 mi |
| 66431 | Harveyville, KS | 13.3 mi |
| 66868 | Reading, KS | 14.2 mi |
| 66846 | Council Grove, KS | 15.7 mi |
| 66413 | Burlingame, KS | 17.5 mi |
| 66801 | Emporia, KS | 18.5 mi |
| 66523 | Osage City, KS | 19.2 mi |
| 66834 | Alta Vista, KS | 19.3 mi |
| 66401 | Alma, KS | 21.2 mi |
| 66864 | Neosho Rapids, KS | 24.3 mi |
Questions about 66833
What is the ZIP+4 code for 66833?
66833 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 66833, you need to look up a specific street address to get them.
What city is 66833?
66833 is assigned to Allen, Kansas, in Lyon 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.